The expectations of your kids are the reason people are begging EPCOT to keep Reflections of Earth for another 30 years. People are terrified of what silliness might ensue with characters there. I'm not attacking you or parents in general, but I'm personally very glad that we currently have two parks with IP centric night shows and two parks without. No other Disney property even has one. I love Wishes and Fantasmic, but Reflections of Earth is my favorite show and I really like Rivers of Light as well. Glad to see the variety, and I'm very happy that like most of Animal Kingdom- the show is devoid of IP. HOWEVER, if the market demands IP in every show, and viewership/feedback is low for non-IP shows, I can see why Disney chooses to placate the needs of children and others who find the non-IP stuff "boring". The market decides...
Having said all that. If they can create a solid IP centric show in 5 or so years that tastefully uses Tarzan, Lion King, Aristocats, Fox and the Hound, Bambi Zootopia and/or other animal/IP stuff to replace Rivers of Light and it's a good show- then I'm all for it! I'll be disappointed in the conceptual change but as long as it's a solid show, I'll take that over a non IP show that stinks (not in any way implying Rivers of Light stinks but a non-IP replacement could). IP is fine in moderation and done in proper venues. I don't think it would be an abomination if a future show has IP though, and I have a feeling that I'm in a huge minority with that opinion here. I'd prefer there to be a good balance and right now there are 3 IP shows and two without and I feel that balance could/should stay. I'm not going to show up with a pitchfork over the possible addition of IP to pretty much anything though. It just doesn't bother me as much as most people I guess (and I don't even have/want kids).
I'll probably end up regretting saying this, but I think I'd even be fine with IP in IllumiNations if it's done right when ROE sadly moves on. Not that I trust them to do it right, but the concept isn't as off putting as the notion of losing Reflections of Earth for anything else!