When a time travel experiment goes awry, Rainbow Dash finds herself a decade into the future. The whole of Equestria, and in fact, the whole planet, has been engulfed in toxic green goo, with a dangerous planet on a collision course straight toward them. Can Rainbow Dash rebuild the time machine, travel back into the past, and save Equestria from its doom?

In case you couldn't tell, this is a semi-crossover with FusionFall. After finding out that OpenFusion exists, it sparked me to this idea.

My Little Pony belongs to Hasbro.
FusionFall belongs to Cartoon Network.