Highly doubtful. I don't even see SCV running well on the system. At most you'll have a Broken Destiny-style game, where its basically the same engine but graphics are downgraded and content is severely cut. The 3DS ain't powerful enough for a straight SCV port.
Heavily customised for the 3DS, perhaps?
Yeah I don't see this happening either.
"Heavily customized" meaning "we stripped like all the features and basically just gave you barebones fighting".
I mean Broken Destiny worked rather fine, but they cut so much content that it totally lacked a lot of what makes Soul Calibur excellent. Like almost nothing for single player. I know fighting games are basically for multiplayer but Soul Calibur has had rather respectable single player content. They'd probably have a similar thing for the 3DS. Cut down and not worth it.
I guess I wouldn't mind a Vita version but it's already got a huge amount of fighters for not even getting an international release. BlazBlue, UMvC3, SFxT coming soon, and probably more inevitable titles. I would enjoy a bit more diversity I guess although if it was a pure port of SCV, that'd be rather worth it (with crossplay at least).