You could see this already in their recent GOAT primetime special. Someone did the numbers, it was like 12% of the questions were about Disney properties.
But the point was that once Alex is gone, there won't be a strong force to keep them from doing that to the regular show. I just hope I'm wrong.
Arguably the hardest quiz on TV (Only Connect) sometimes has stuff from kid's TV shows (e.g. the surnames of Scooby's human companions) but it's still stupidly hard. There's a difference between needing to know which Disney resort is in Florida and needing to be able to know the first four animated feature films Disney made in order.
My hope is that they hire Ken Jennings and he carries on the tradition fully in honor of Trebek.