The bolded has the best chance due to them having an iOS version already to be ported to Vita. That would be a great fit for Vita too; the system has a lack of turn-based stratage games, so that would be nice
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I could also see Bioshock 1 being ported to Vita as well. Between Bioshock being promised to come to Vita ages ago and the fact they got the game running on iOS (not to mention the success of Borderlands 2 on Vita), that also has a good chance of coming to Vita too.
Did BL2 actually succeed all that much on the Vita?
I'd really like getting a Bioshock on the Vita, even if it's a late port. I'm not into strategy games so XCOM is not something that I'll like all that much.
I'm not expecting all that much though. I'll sure watch the conference but I'm trying to not get hyped.