Apparently, according to this interview,
Masachika Kawata has expressed interest in remaking other RE titles (of the first three) for the Wii (in RE4Wii style, from the sound of it). Sadly, there's no online planned for RE:UC. Goodbye online co-op
Also,
when asked why RE5 isn't developped for the Wii, he replies that RE:UC (or RE4Wii, didn't quite catch that) is a test to see how well the series would perform on the Wii.
More on RE:UC : They're
still looking into how they could use other Wiimote functionalities or the Nunchuck in the game. It will be
more than just a simple light-gun game, but will try to tie up and explain more of the story in the RE game. RE1 and RE3 were specifically mentioned in the interview, giving the impression that RE2 isn't present?
No plans or ideas for an RE game on the PSP.
They (him and other old staff members) would like to do a new Dino Crisis game, but there's currently nothing in the works.