Apparently, Fedor has a clause in his contract that states if Strikeforce's majority share changes hands, he will then become a free agent and can renegotiate his terms.
At this point though, Fedor is a nobody that has been beaten by a UFC reject and an over sized monkey. His best bet would be to stay where he's at because there is no way that Zuffa agrees to M-1 Gloabal's ridiculous terms. Bottom line is that Fedor's keepers should have put him in the UFC years ago.