Complex sentence: Downey reprised the role for a fifth time in another sequel, "Iron Man 3", which was released on May 3,2013, and has signed on for "The Avengers 2" and "3".
Split into simpler sentences: Downey reprised the role for a fifth time in another sequel, "Iron Man 3", which was released on May 3,2013. Downey has signed on to reprise the role for "The Avengers 2" and "3".