Revelation 3:12 clearly states that Jesus will have a new name at some point. It also seems to suggest that name will be God's name and the Messiah's name:
"Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God, which is new Jerusalem, which cometh down out of heaven from my God: and I will write upon him my new name. "
So, when Jesus returns, we might expect his name to be something new; something other than Jesus. What else, besides Michael, could it be?