If Bluehole was smart, they'd basically make them pay out the nose. Like... Minecraft money, because at this point it's trending to be worth more than Minecraft (or at least, that's my opinion), considering the explosive popularity, streaming and so on. If they were smart, they would make Microsoft at least pay all possible sales that could of happened on the PS4, which could be MASSIVE for the system. The fact that it sold over 3 million on Steam in less than one year is absolutely huge. Bluehole holds all the cards in this deals.
Also, as a side thing, I think keeping it to one console for something this massive, especially since Microsoft doesn't own the company, would be a really stupid thing for Bluehole to do.