Question: Son of Batman was released as a digital download on April 22, 2014, as part of what direct-to-video film projects being created by Warner Premiere, Warner Bros. Animation, and DC Comics?

Context articles: Superman: Doomsday
Paul Dini
Superman/Batman: Public Enemies
DC Universe Animated Original Movies
Son of Batman
Superman/Batman: Apocalypse
Batman vs. Two-Face
Tom and Jerry: The Lost Dragon
Batman: Under the Red Hood
Green Lantern: First Flight

Superman: Doomsday is a 2007 American direct-to-video animated superhero film, adapted from the popular DC Comics storyline "The Death of Superman", focusing on the supposed death of the superhero Superman.
 The film is rated PG-13 by the Motion Picture Association of America for action violence and is the first in the DC Universe Animated Original Movies line released by Warner Premiere and Warner Bros.
 Animation.
 It was followed by "".
Paul Dini ( ; born August 7, 1957) is an American writer and producer who works in the television and comic book industries.
 He is best known as a producer and writer for several Warner Bros.
 Animation/DC Comics animated series, including "Tiny Toon Adventures", "", "", "The New Batman/Superman Adventures", "Batman Beyond", and "Duck Dodgers".
 He developed and scripted "Krypto the Superdog" and contributed scripts to "Transformers", "Animaniacs", "Freakazoid" and "Static Shock".
 After leaving Warner Bros.
 Animation in early 2004, Dini went on to write and story edit the popular ABC adventure series "Lost".
 He has written a number of comic books for DC Comics, including "Harley Quinn" and "Superman: Peace on Earth".
 October 2010 saw the debut of "Tower Prep", a new live action/drama series Dini created for Cartoon Network.
 It was announced that after two decades of doing DC-related animated projects, Paul Dini has gone over to Marvel to serve as a writer and producer for "Ultimate Spider-Man" and "Hulk and the Agents of S.M.A.S.H.".
Superman/Batman: Public Enemies is a 2009 original direct-to-video animated superhero film adaptation of "Public Enemies"—the opening story arc of DC Comics' "Superman/Batman"—which focuses on Superman and Batman teaming up to prevent a meteorite from striking Earth and take down Lex Luthor, who has been elected President of the United States.
 The film is the sixth in the line of the DC Universe Animated Original Movies line released by Warner Premiere and Warner Bros.
 Animation.
 Voice actors from the DCAU reprised their roles, although it is not a DCAU production and is said not to be connected with that universe beyond sharing of voice actors.
 The film is directed by Sam Liu.
The DC Universe Animated Original Movies (also known as DC Universe Original Movies) are direct-to-video film projects being created by Warner Premiere, Warner Bros.
 Animation, and DC Comics with the help of producers such as Bruce Timm.
 These more recent movie projects have also included many of the voice actors who worked on previous DC animated series and films.
Son of Batman is a direct-to-video animated superhero film which is part of the DC Universe Animated Original Movies.
 It is an adaptation of Grant Morrison and Andy Kubert's 2006 "Batman and Son" storyline.
<ref name="http://www.flickeringmyth.com"> </ref> The film was released as a digital download on April 22, 2014, and was released on physical media May 6, 2014.
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Superman/Batman: Apocalypse is a 2010 direct-to-video animated superhero film based on the "Superman/Batman" comic storyline "The Supergirl from Krypton" and is a sequel to "".
 The art style is partly based on that of Michael Turner, who penciled the "Superman/Batman" comic book arc.
 The film is the ninth in the DC Universe Animated Original Movies line released by Warner Premiere and Warner Bros.
 Animation and the first sequel in the line.
 It was released on September 28, 2010.
 The film stars Andre Braugher, Kevin Conroy, Tim Daly and Summer Glau.
 Despite the title, the film focuses primarily on the introduction of Supergirl and her relationship with Superman.
 Batman plays a supporting role.
Batman vs. Two-Face is an upcoming 2017 American animated direct-to-video superhero film produced by Warner Bros.
 Animation and distributed by Warner Bros.
 Home Entertainment.
 It is a sequel to "".
 It will premiere at the New York Comic Con on October 8, 2017 and will be followed by a digital release on October 10, 2017 and on DVD and Blu-ray on October 17, 2017.
 Based on the 1960s "Batman" TV series, the film stars Adam West (in his final role before his death), Burt Ward and Julie Newmar reprising their roles of Batman, Robin and Catwoman from the series.
 The film will show a tribute to the late Adam West.
 This could also be the final time Warner Bros.
 Animation would make a 1960s Batman film.
Tom and Jerry: The Lost Dragon is a 2014 animated fantasy comedy direct-to-video film starring Tom and Jerry, produced by Warner Bros.
 Animation.
 Directed and produced by Spike Brandt and Tony Cervone, it premiered on July 27, 2014, at San Diego Comic-Con International.
 It is the first Tom and Jerry direct-to-video film to be marketed by Warner Bros.
 Home Entertainment in Japan.
 It was originally released digitally on August 19, 2014, to be followed by a DVD release on September 2, 2014.
Batman: Under the Red Hood is a 2010 American animated superhero direct-to-video film produced by Warner Bros.
 Animation and released by Warner Home Video.
 It is the eighth feature in the DC Universe Animated Original Movies series.
 It was released on July 27, 2010.
 The film stars Bruce Greenwood as Bruce Wayne/Batman, Jensen Ackles as the Red Hood/Jason Todd, John DiMaggio as the Joker, Neil Patrick Harris as Nightwing/Dick Grayson, Jason Isaacs as Ra's al Ghul, and Wade Williams as Black Mask.
 The screenplay was written by Judd Winick, who also wrote the "" run in the monthly "Batman" comic.As in the comic, it focuses on Batman dealing with the return of his former apprentice, the second Robin, Jason Todd , who now goes by the moniker of Red Hood, a murderous vigilante and the former alias of Batman's archenemy , The Joker , on whom Jason is trying to exact revenge.
Green Lantern: First Flight is a 2009 direct-to-video animated superhero film adaptation of the DC Comics Green Lantern mythology.
 Centering on the first mission of Hal Jordan (Christopher Meloni), the first human inducted into the Green Lantern Corps, the film is written by veteran DC Comics animation collaborator Alan Burnett, produced by Bruce Timm, and directed by Lauren Montgomery.
 It is the fifth in the line of DC Universe Animated Original Movies released by Warner Premiere and Warner Bros.
 Animation.
 Its US broadcast premiere was on Saturday January 16, 2010, at 8:00 p.m. on Cartoon Network.