Mike Tyson vs George Foreman in 1991 and 1996

This is how both fights would've gone IMO
(either fight, both dont happen in the same universe)

Tyson-Foreman: The Mirage
Broadcasted on KingVision x Showtime
Date: Mid 1991
Venue: The Mirage (hence the billed name)
Undisputed heavyweight championship elimination bout to fight Evander Holyfield
TLDR; Tyson UD 115-113

Rounds 1 to 4: Tyson comes out hot and blazing. He knows he can not take Foreman in the first round but remains highly active to pressure Foreman. Foreman starts swinging and mostly misses, but he lands some good shots, which Tyson respects. (39-37)
Rounds 5 to 8: Foreman begins to up the ante and starts to take the challenge. He begins to land more clean shots on Tyson and clips him with a right hook which buckles his legs. Foreman tries to crack Tyson but Tyson's athleticism and speed keeps him adamant (77-75)
Rounds 9 to 11: Tyson begins to tire and he is fatigued. Foreman who stays in the fight longer knows this and tests Tyson's timing. Tyson starts taking more and more hits and he's close to being a virtual walking target. Foreman misses a big left hand and Tyson responds with a desperate left of himself which stuns Foreman. Tyson responds with an overhand right and follows up with a combination, an unanswered 19 punches. Although Foreman troubles his opponent in rounds 9 to 10, Tyson takes the 11th with that 20-punch combination (105-104)
Round 12: Both fighters are exhausted and can't go toe-to-toe without either one of them backing out and both playing the goose chase game. Tyson tries to control Foreman with the jab, slipping the passive hands of the gassed Foreman and tries to steal another round but then Foreman follows up with a 4-punch combination that stuns Tyson as he scrunches up and instead tries to make Foreman miss. In the last seconds Tyson throws a left hand right uppercut combination that catches Foreman, before the bell rings and Foreman stuns Tyson with a right cross, he almost trips on his feet as he retreats to his corner.
In this alternate universe, Tyson goes on to fight Holyfield in 1991 and wins a similar decision win.

Tyson-Foreman: The Championship Part II
Broadcasted on HBO
Date: Mid 1996
Venue: Madison Square Garden
WBC and Lineal heavyweight championship
TLDR; Foreman 10th round KO 84-86
Rounds 1 and 2: Tyson comes hot and blazing. He knows he can not take Foreman in the first round but remains highly active to pressure Foreman. Foreman starts swinging and lands some good shots, which catches Tyson off guard. Foreman hurts Tyson but Tyson stays adamant, trading some good blows. 2 closely fought rounds (20-18)
Rounds 3 to 7: Foreman begins to up the ante and starts to take the challenge. He begins to land even more clean shots on Tyson and clips with a left hook which knocks Tyson down in the 4th round. But Tyson gets up at the count of 4 In rounds 5 and 6, Tyson makes some good rallies. Foreman doesn't capitalize on this but he knows Tyson's spirit is winding down. (66-66)
Rounds 8 and 9: Foreman adds more and more pressure to Tyson who starts to become desperate, and starts to crouch in his guard. Round after round Foreman starts breaking not just Tyson's will but his guard, and the end seems imminent. The highlight of the 2 rounds is when Foreman times a Tyson slip to the right and throws a mean right cross that buckles Tyson's knees, as he holds on and sneaks an elbow. However, Tyson has some good moments and holds his stand up to the next round. (84-86)
Round 10: Tyson comes out trying to rally and pull a puncher's chance card but he's too gassed to respond effectively. Foreman carefully and calmly stalks him, getting him into corners and ropes. "A 1-2 combo staggers Tyson, a good one by Foreman, another left uppercut rocks Tyson as he holds on, he's hurt!" are the words that come out of Jim Lampley. As Foreman pushes Tyson after a couple seconds of hugging, as soon as Tyson throws a powerful left hand, Foreman responds with his own power punch, the overhand right, which digs into Tyson's temple as he falls to the canvas. As Tyson tries to get up, his already worn out knees give in and Tyson wobbles, the referee stops the fight!
In this alternate universe, Foreman loses a wide UD to Lennox Lewis and gives him the Lineal and WBC titles. Tyson becomes boxing's showman, fighting mid-tier opposition and gets his final shot against Lennox in 1999, where he loses by a wide UD.