WoW.. Umm WTF did you just say?
Anyway, CoD5 might be on the Wii.. Treyarch makes that version so you should skip it anyway....
Anyway I have CoD4, and I've seen SMG.. It's not just a few steps above it.. its leaps and bounds ahead of it graphically... Something I believe the Wii "Might" be able to handle at the end of its life cycle..
So in the end, no point.. Wii consumers wouldn't be getting the full experience..