You mean it isnt already?
Granted this game wasnt in development hell, but it pretty much fills the role anyway
On my end, I consider MegaPhilX's Mega Man Unlimited to be filling up that position (it was originally gonna get released in March, then wisely switched to not having a deadline anymore), but that's neither here, nor there.
Still, it'd be sad if the dream of a MML trilogy conclusion doesn't come true...
On a side note, we can't play games if the world ends, you sillies.
Let's not compare game release likelihood to that concept. I prefer the idea of Heck freezing over more than once.