Re: Marvels biggest slap in the face!!!
It depends on what you mean by "Marvel". If you're referring to all Marvel films in general, I don't know where to start. Marvel's had some really bad stinkers pre-MCU. If you're referring to just the films made by Marvel Studios, the biggest slaps in the face so far would have to be their treatment of the Mandarin and of Hank Pym. What they did with those characters (or what they are about to do, in Hank Pym's case) is just as bad as some of the things that other studios like Fox/WB/Sony have done in the past, maybe even a bit worse.