The trailer for Captain America: Civil War came out last night (distracting Marvel fans from talking about Jessica Jones for a while) and revealed the basics of why MCU Cap and Iron Man are going to fall out. Empire talked to the directors the Russo brothers and they dropped some biggish hints here.
Two of the major players in the setting (PCs, if you will) disagree and it escalates to combat. As long as it’s PC v. PC and not player v. player, this can make for pretty interesting developments.
Hence not one but two seasons of The Watch House ending with PC heel turns - with the heel PCs set up by their players to provide a good fight and lose.