Having just this minute published my review of the PSP edition, here comes news that the Vita EXTEND version is now confirmed for a European launch. It pretty much mirrors the PSP release, but - and here's hoping - the PSP's ad hoc-only multiplayer also gets a boost.
The press release says, "Brand new Team Battles for a better online experience. Play 2v2, 3v3 and even handicapped matchups, like 2v4." But doesn't specify if that's for the PS3/Xbox version only. Checking out to confirm if the Vita will benefit too.