Not too sure about this Infinity stuff now, especially since the blink-and-miss-it E3 announce, and Sony's history of making promises it can't keep. Now, Sony don't mention the Vita in their own blog post, which is rather alarming. Also, while I know it is not exactly a gaming bible, the new Argos catalogue makes no mention of a Vita version of DI2. Maybe its out there somewhere, but if stores don't know about it, why should buyers care?
Anyway, assuming it is in the works, the flavour-of-the-month Guardians of the Galaxy will be making an appearance for the figures-cum-game experience. It features Star-Lord and Gamora in the Guardians of the Galaxy Play Set, and you’re also going to have the option to pick up Drax, Groot, and Rocket as singles at launch.