Sorry dude. Not going to happen, and Boba Fett will not be involved. Mace will fight Palpatine until he wears him down to such an extent that Palpatine starts looking like the Emperor, at which point Anakin comes along. Both Palpatine and Mace argue with Anakin about what he should do. Anakin amputates Mace's hand, and then Palpatine fries Mace off a ledge and into the traffic on Coruscant.