Won't happen.
Vince has ALWAYS hated the dolphins, long before he was a patsie. He was a bucs fan growing up.
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He has said more than a few times he would never ever play for the dolphins.and I believe him.
He actually was a Bills fan growing up, which is why he "hates" the Dolphins. Bills/Dolphins in the 90's was arguably the most fierce rivalry in football (and he was drafted by New England, not exactly the Bills friend and made due with that for 10 years.)
And in 2010, before he got resigned by New England, he never ruled out playing for the Dolphins, going as far to say that he'd be interested in playing for the Dolphins if the opportunity presented itself. Now this could be just agent talk or whatever, but don't underestimate the power of money/hometown late in his career.