no offence, but you don't have any kind of proof, you just have angry internet fan theories along the same lines as people on-line believing Luke Skywalker was Kylo Ren a few months ago... which really didn't make any kind of sense but whole lot of people seemed to want to believe anyway... So if keep that in mind and just you look at the Marvel thing logically, it all kind of falls into place...
First off Disney owns "all" the Marvel characters, so why would they build themed lands in their parks for just the Avengers/MCU characters? The answer is they won't... and they haven't, but they can't build a themed land for all the Marvel characters until they get all the Marvel Movies into a single story continuity, which they seem to be in the process of doing
Disney/Marvel's "Captain America Civil War", which comes out May 6th, will introduce the new Spiderman that will also be appearing in Sony's stand alone films, and a then a few weeks later on May 27th Fox's "X-men Apocalypse" will be released which will probably be the end of the current X-men story line... so it sounds like a re-boot of X-men is coming up real soon
Once Disney solves the problem of the story continuity and gets the Disney/Sony/Fox film in sync, they are also making it more and more difficult and expensive for Universal to do anything with Marvel in Orlando. At a certain point they only way for Universal to make any money on the theme park rights to Marvel is buy selling those theme park rights to Disney, and the distribution deal for DreamWorks probably figures into that, because Disney is "letting it expire". Comcast/Universal and the Walt Disney Company don't really care how they make money, as long as the keep making money and not losing it.
So step one is getting all the movies in sync, and when Kevin Feigie got moved to Walt Disney Films, he also stopped producing/supervising Marvel Television to focus completely on the films, and I'm assuming that means not just the "Disney/Marvel" produced films but also the "Sony" Spiderman, and probably the "20th Century Fox" films as well. Then not long after that it was Announced that Joe Rohde would head up Marvel Theme park attractions, but the movies are going dictate whatever they do in the parks, so we're going to have to wait and see what happens with Civil War and X-men Apocalypse this May