But that goes both ways which is why I think a mixing makes more sense. You are right, people know what a haunted house is. But how many people have never seen GotG, but would know what an adventure through space means? Or how many have never seen Tron (which, I have not so I can't even make a remark as to what the bigger view would be on it)?
I think the disconnect going right now is that I think both sides here are kind of in the same place. One side has people that think IP is fine/great/makes sense, the other hates it. BUT, I'd make an educated guess the first side would agree it should fit the general theming of the larger area, and the second group most likely hates it because they don't trust it will. Basically, one side thinks it's all like adding Toy Story to DHS, the other thinks it's going to be like more like adding Toy Story to the Japan pavilion.