Imagine, for a moment, that The Avengers weren't the Marvel heroes that we know and love -- and instead, they were Sailor Moon characters. OK, I know that sounds bizarre but... just stick with me here, OK?
Turns out, the mashup would work pretty well -- at least, if we're going off the Sailor Moon x Avengers renditions drawn up by jei-shepard. Take a look:
Sailor Mars x Hawkeye
Sailor Jupiter x Thor
Sailor Mercury x Iron Man
Sailor Venus x Black Widow
Sailor Moon x Captain America
Now if only this crossover could actually happen!