Anything with the name Marvel or Avengers in it will get a lot of attention and that is why the fans think that Disney won’t just kill it off and put it in a box.
We could see why Disney would want to kill off the Marvel: Avengers Alliance game and its sequel. While the first game was very well received, the sequel was way less successful and like Disney said, they just did not want to waste their time on that and would rather use that time and effort on another game.
Well, some fans believe that Disney might be working on a new Avengers game and that they got rid of the less popular game so that it does not get mixed up with the new game. Disney has never indicated that a new Avengers game in on the way so takes it with a pinch of salt.