If we look at it like this. Despero beat the JLA so he stands a fairly decent chance against the Avengers, nice ok. But when you look at the powers of the teams and compare it to what despero has shown it doesnt really make sense that he was able to beat the Jla. Basicaly the jla had to lose for the purpose of the story line, using kmc rules in a vs battle they win 10/10 every time imo and the same for this Avengers team. Also it looked like Superman 1 shot Despero with heat vision in Superman/Batman.