Good sequel which develops Gru as a character a bit more thoroughly

Rating: 9/10 (14 July 2015)

This film was nominated for the Academy Award for Animated Feature, losing to Frozen. There will be spoilers ahead:
This film more or less picks up where the first one left off (though you can watch it even if you haven't seen the first one). Gru is no longer a super villain, instead opting to raise the three girls (Margo, Edith and Agnes) he's adopted and going into business making jelly and not being all that successful.
His assistant, Dr. Nefario, takes another job, preferring the old evil ways to the new ones. Gru is recruited by Lucy Wild, an agent for the good guys, the Anti-Villain League, who brings him in after tasing him ("lipstick taser!") and essentially kidnapping him. Gru turns them down at first and then decides to accept.
Gru finds that he and Lucy have been teamed up undercover at the mall, running an operation out of a cupcake shop (Lucy has more and cooler toys than James Bond). They meet two suspects, one man Gru is convinced is one-time super villain El Macho and one named Floyd Eagle-san. Gru and Lucy break into El Macho's Mexican restaurant and run afoul of Macho's chicken security guard, Lucy ultimately foiling the bird and the two making their escape.
Lucy and Gru hit it off after she rescues Gru from his blind date from hell and it sets up a beautiful sequence utilizing the song "Happy", showing Gru as just that-happy, because things are going so well with Lucy. But events intervene.
Eventually, the AVL finds evidence that Floyd is who they're seeking and they shut down the operation, with plans to drop Gru as an agent and send Lucy to Australia. So Gru deflates, starts moping around and winds up at the Cinco de Mayo celebration at El Macho's restaurant because Margo is infatuated with Macho's son Antonio. Gru learns that he's right, this is El Macho and he's the super villain AVL was looking for. Dr. Nefario is working for El Macho now and has taken (Minion-napped?) a huge number of Gru's Minions (who are all over this film) as part of his scheme, which I won't spoil here.
Ultimately, Gru winds up a hero by derailing El Macho's plans. The resolution of the subplot with Lucy is perfect and there's room for a Despicable Me 3 (not to mention a financial incentive, given the success of the first two films and the most recent prequel's success at this writing, Minions, a film featuring the Minions).
This film is available on Blu Ray and DVD and is worth watching. Most recommended.