Portable VF would be very hot. Honestly, I don't play Final Showdown...I'll even pop in VF5 PS3 before it, which is based on the ancient rev.B of the game, since it has Quest Mode and better sound/graphics. I actually like Quest Mode the best, since I'm not really trying to get seriously good at the game. And the sound in FS really sucks bad. I have to use headphones because it's a mess on my shitty TV speakers. VF4: Evolution is also still a fucking awesome game with a robust quest mode.
Skipping DoA, I 100% dropped the PS3 version, so I'm not too interested in this port. Plus, there's zero chance of it replacing UMVC3, which is not just my favorite fighter, but one of my favorite games right now. I still can't get over that I'm playing a near perfect version of it on a handheld.