Itss the quality of the movies coming out. Marvel lacks creativity and goes with what ever can make an extra buck. This ongoing mcu will end on a low note. Just the fact that they have its tv shows in the same universe means they cantt end either and start fresh at any point. The only way it can end is from it being so out played that they stop making as much money. And just like half of the video games, and comic story lines, if it doesntt make as much money as they wanted it to initially, they will scrap it. The character development for dc projects are so realistic. Thatss a quality marvel will never have.