after Tom cruise makes a huge amount of money from MI3 i think he will take some of your advise. He might buy another house, or go to places where people cheer less when he arrives. He then will travel to Earth-5, and contact Tom cruise prime. Prime will go nuts from being jealous of our Toms fame and fortune, he will construct a anti-moniter suit and go on a path of destruction. The suit will give him limitless strength etc, but his rage and fury will make him like a child. While trying to break into this dimension , he will smash on the space time barrier and alter reality retconning only certain events.
After he does this he will get tired, and return to his earth to persue an acting carrer and play the new Superman in Superman:Travels through time. Also starring a blond haired actress named Katie Cat as Lois lane. Earth-5 Shack as Lex Luthor, and Earth-5 Will smith as Jimmy olsen. Rounding out the cast is new comer bill murray as perry wright.