Interesting that there are misconceptions about the rights at Disney. It reminds me about the original Muppet Babies cartoon. Fans of the show assumed the reason it’s never got a DVD release is that the rights for all the old movie and tv clips would be too expensive or need approval for use again. There was an interview with one of the producers who made it clear that is not an issue at all. During production he personally got clearance for that footage for any future release in any format. That show was largely built around old footage, they needed to ensure it could survive.