Let The Market Decide
I know this may not be a popular opinion, but I say this: Let the market decide.
I'm sure there are a few B:TAS fans who still are upset about TNBA and S:TAS, and consider BB sacreligious. If they had signed petitions to keep Batman/Superman and Justice League off the air, I'd have been one pissed off Dini/Timm DC Universe fan. But, they came out, and everyone let the market decide. And the market (us, and everyone else who watches the Dini/Timm DC Universe TV shows) loved them!
My point is that, even if Disney fails miserably, they have a right to try. Continuing popular storylines isn't such a bad thing; that's what the Dini/Timm DC Universe has been all about, right?
I think I know what Disney's been thinking. They see Warner Bros. and their DC Universe, they see 20th Century Fox and their Marvel Universe, and Disney's owners said to themselves, "Hey, wait. We've got several 'universes' from which we could work. If WB and Fox can make entire franchises out of their iconic characters, why can't we?"
So, they started small, with sequels and regular TV shows to Aladdin, The Lion King, and Hercules. The Aladdin sequel movies were big hits, as was The Lion King sequel. "Timon & Poomba" and "Hercules" (the TV series) also did really well. So they thought, why stop here? Now they're trying out expanding their other franchises.
I can't say I blame them; if I was the owner of Disney (or Warner Bros., or 20th Century Fox) I'd be doing the same thing. But, I minored in Business in college, so then again, maybe I'm the only one here thinking about this from an economic point of view.
Favorites! (1) Action: Transformers & G.I. Joe; Visionairies; The DCAU; Robotech, DBZ, Cowboy Bebop, Samurai Champloo & Trigun; TMNT, MOTU; and Avengers: EMH; (2) Comedy: The Simpsons & Futurama, Space Ghost: Coast to Coast & The Brak Show, Sealab 2021, Harvey Birdman: Attorney at Law, ATHF, The Boondocks, The Venture Bros., and Archer