A crossover with MLP, Mega Man, Marvel, and Super Sentai.

Prince Russcorn has created two M: AA clones called My Little Pony Alliance and Mega Man: Robot Master Alliance. Both of them prove so successful that they overshadow M: AA to the point where it's considered a far inferior ripoff of the other two. A while later, a mysterious evil starts resurrecting and upgrading past Super Sentai villains to utterly overpower the Marvel universe. Russcorn brings the fighters from both of his M: AA clones to defeat the invaders while reenacting his favorite show, Super Sentai. But the invaders themselves are the least of the Marvel heroes' worries - Marvel is fading out! Not only do the M: AA clones have far superior fighters, but both of their franchises are making their own Sentai-level action-packed cinematic universes that are also overshadowing Marvel! Not helped by the fact that Russcorn is a magical winged unicorn rather than an interchangeable Agent of SHIELD. While Russcorn fights the invaders, he must also prove that Marvel is still relevant - and unravel a conspiracy more powerful than the Marvel universe itself.