Sonic the Hedgehog series: What if... Infinite (the last survivor and former Jackal Squad leader; the Ultimate Mercenary) die and sacrifice himself to become a hero to save Shadow the Ultimate Lifeform in the very end for some reason?
(Hint: This never happened before.)
@ConceptChaos @Dreadish Shadow the Hedgehog: (facepalm) Why, Faker?
(Part 1) What if... the (real) Time Eater (possibly; Mephiles the Dark) found and captured (Classic) Dr. Eggman Robotnik and Infinite (former Jackal Squad leader; the Ultimate Mercenary) for some reason? (from Sonic Mania, and Sonic Forces, Sonic the Hedgehog series)
Instead of a female Mewtwo
What if... Mewtwo (from Pokemon the 1st/First movie: Mewtwo Strikes Back) meet the Genesect Army in "Pokemon: Genesect and the Legend Awakened" instead?
(I know, this never happened.)
(Part 10; Final) Infinite's secret plan (from Sonic the Hedgehog series)
Infinite: The HEART, Two-Tailed Fox (Tails Prower). First we attack his heart. (Meaning: defeat or kill Rouge the Bat and E-123 Omega for Shadow)
Hint: Spider-Man (2002 film) style
Shadow the Hedgehog reaction of Sonic the Hedgehog acting like Eddie Brock/Venom (from Spider-Man 3 (2007 film/movie) for some reason.
Shadow: (facepalm) Why, Faker?