No way. It doesn't matter how many people actually use Linux, it's a matter of how many want to play games on it. Look at the statistics for things like the Humble Bundle: http://www.humblebundle.com/

Linux is a very niche market for games, which is why not many games are made for it. Mac users have relatively few choices in games as well, *especially* for MMOs, so even that would be more likely. Though, as others pointed out, the graphics engine wasn't built for it, so it's very unlikely.