Not sure what to do...

I've actually sat back in my chair just mini-raging how Wii wasn't going to have Marvel vs. Capcom 3

...Unlike previous titles in the series, Capcom currently has no plans for an arcade release, and will initially focus only on console versions for the PlayStation 3 and Xbox 360, and has expected to sell 2 millions units of Marvel vs. Capcom 3 worldwide across both platforms. Niitsuma has been asked if he plans on releasing the game on other consoles besides the PlayStation 3 and Xbox 360, in which he responded that if the game sells well, there is a possibility that it might be released on the Nintendo Wii as well.

You still have a chance. But anyways, you should buy a PS3 for other games that won't be on Wii.