9. Kevin Feige Vs. Avi Arad
Despite helping to at least open the door for superhero movies, producer Avi Arad is widely credited for running the Spider-Man franchise into the ground with the creative decisions he forced on both Spider-Man 3 and The Amazing Spider-Man movies. Kevin Feige and Arad don't get along, and when the latter quit Marvel in 2006 due to a lack of faith in their ideas for a Cinematic Universe, it was Feige who would soon take over as the studio's head. Arad has since tried to take credit for creating Marvel's slate, despite at one time happily agreeing to produce a movie which would have seen Iron Man unable to fly and dressed by his toaster. This has created a lot of tension between the two, and explains why Arad was so dead set against Spider-Man ever joining The Avengers when interviewed in 2014. Feige however would emerge victorious - it's been widely reported that he was insistent that Arad have absolutely no involvement with Marvel and Sony's reboot of Spider-Man.