Again, you are talking about Disney classics with Peter Pan, Dumbo, Snow White, etc... We are talking about less popular modern IPs. Mr. Toad was removed and the outcry was only from park fanboys. Nobody in the general population cared that it was gone. People back in the day didn't say, "I can't wait to go to WDW to ride the Mr Toad ride". They do and will say that about major IPs like Star Wars and Harry Potter or classics like Peter Pan or Snow White.
Very few people will care if Stitch doesn't have a ride or if some day Universal removes Men in Black or Fast & Furious or Minions for the next big hit. I don't dispute that a ride like Splash Mountain that is great can last indefinitely despite an unpopular IP. The difference is the ride is a true e-ticket so it stands on its own.
Getting back to the original topic, if they shoehorn Wreck It Ralph into the Stitch attraction it's unlikely to be a true e-ticket or classic ride that will stand on its own. I said unlikely, not impossible and I'm not judging the ride before it even opens, just being real. It's not likely to be enough of a classic to stand on its own. If/when Ralph loses some popularity a few decades from now it will probably get switched for a new IP which was the only point I was making in the post that started this whole discussion tangent.
This is true, but those are also Classic Disney rides (mostly DL originals) based on classic Disney movies. Nostalgia plays a large part in their popularity (the movies and the rides). I agree that Disney has done a great job with keeping those classics alive with the parks and marketing the nostalgia. I'm just skeptical that they will be able to do the same thing with IPs like Avatar or Wreck-it Ralph or even Guardians of the Galaxy. The nostalgia factor just won't be there so if the ride can't stand up on its own (like Stitch now) it will eventually be replaced.