Nah, no RE2 remake for Wii... It's already practically available for Wii in the form of the Gamecube version. I wouldn't bother if i were Capcom!
They could make a game that continues where RE4 ended with another main story but somehow connected to RE4... The ending of RE4 was semi-open. So, that could be a possibility seeing that RE5 seems to be unplugged of the main RE story-line (I don't know this for sure, only the game seems totally different from the older versions).
THE NETHERLANDS