Henry Jackman, who has also composed the music for X-Men: First Class and Captain America: The Winter Soldier, told Collider that he had heard of a Wreck-It Ralph sequel, but was quiet on details. "I can't tell you more, not because I'm being coy, but I believe that it is officially on the cards. I don't know any more other than a story is indeed being written."
While not a confirmed or official storyline, Wreck-It Ralph director Rich Moore told Hypable in February 2013 that he and the voice of Ralph, John C. Reilly, pondered a possible plot involving alternate versions of the characters from the first film. "Are there other Ralphs that are more contemporary?" Moore pondered. "Is there another version of the game that was made for mobile? Are there those kind of Super Smash Bros types games where all the characters are gathered in a fighting game? What would that be like for Ralph to come face to face with those different iterations of himself?"
Mayhaps Ralph could enlist the help of Sonic? He's got some experience dealing with past and present selves meeting up.