I would not count on it happening. The big thing the GBA had going for it was the fact that Capcom still had the old SNES sprites and graphics around and could easily just reuse those. Sure they had to draw new animations for the attacks they didn't have in SSF2, but it wouldn't have been that much work. (they did it really bad though) That and a couple of tweaks later, SSF2T Revival for GBA. This goes double for the PSP games since they really don't have to do anything here except memory management, and believe me they aren't gonna do much else either.
For them to do a DS version would probably mean an entirely reworked sprite set as well as reworked backgrounds like you would see it on the SNES/Genesis back then. Now granted they can get it a lot closer on the DS than they could the SNES/Genesis and it would probably be a better port than ANYTHING they did on the PS1. Capcom wouldn't do it though, and the big reason being that they probably don't have many sprite artists around anymore. That and let's be honest, if the PSP SFA3 Max is any indication of how they would handle the sprites, I wouldn't want any part of it. The main characters that were in the game to begin with look good, but Maki, Eagle, Yun, and Ingrid look horrible in comparison. They didn't bother to touch up those sprites at all and you can tell they weren't in the game originally.