I feel as though this short had too much of a focus on the gimmick (i.e. The crossover, the artwork in the credits and the characters being in their Avengers form) and little to no focus on the storyline which was strongly lacking and also very disappointing. Take The 8-Bit Guy's analogy as to why he preferred the games for the original Game Boy rather than those made for the Game Boy Color as an example, the reason why he preferred the original is because they actually had good gameplay, and the ones for the Color focused too much on the graphics and not much on the gameplay. I think that analogy applies here as well. This short tried to wow the viewers with the graphics and artwork, yet they fell through and failed on the storyline. AT THE VERY LEAST it would have been cool to see what Bart would be like as an Avenger, and yet that (for obvious reasons) didn't happen because of what Loki and Lisa did. I just can't help but feel very disappointed.
Update/Edit - I'm gonna have to disagree with Amelia Ortega on this one. It might seem fun, but out of all Simpsons characters to play as Marvel characters, I wish Bart was one of them, as I think it would have been really cool as this would totally be his thing. Sadly, we visit the root issue: what Lisa and Loki inevitably did which stopped that from happening. That seems to be all there is to the failing storyline.