Martian Manhunter has a specific extremely exploitable weakness to fire. Doesn't it make sense that this exploitable weakness would be taken advantage of in some way by the Avengers? I'm sure that with prep they would take time to analyze Manhunter and come up with a way to use this weakness against him. Also, Iron man most likely still has those microscopic telepathic tasers from AvX. Wouldn't he at least try to use those against Manhunter?