Uncharted: Golden Abyss, Gravity Rush or Ultimate Marvel vs Capcom?

I'm thinking about picking up a vita next month and since I have only enough money for one game I wanna know which one would be the best option and the one that would last me more time. 

I really don't have any preferences for genre or anything, so no bs in my decision. I'll evetually get all, but for now I can only stick to one. Suggestions are accepted.