RSR looks like it would be a decent attraction, but not enough to make me want to travel out to California. It looks too kiddy for me, and lacking in the darker elements found in some of the Fantasyland dark rides. I haven't been to DL since March 2010. Next time, i have money for a trip, I'm going back to Universal Orlando since they can build rides that adults can really enjoy again and again like Harry Potter and the Forbidden Journey, Spider-Man, Revenge of the Mummy, Men in Black: Alien Attack, Ripsaw Falls, The Simpsons Ride etc. And these aren't rides that are nearing 20 years old (and in a lot of cases much older) like Indy. I love Indy and it's the second best ride I've been on other than Harry Potter and the Forbidden Journey, but it's time for Disney to build another Indy. Tower of Terror is great, but it's a modified clone from WDW so it wasn't really something new. So the last new great, ground breaking teen/adult aimed attraction at DL is Indy, which is 17 years old. I really think Disney is aiming straight for kids now days.
I would so get in my car and drive to DL right now if they built Journey to the Center of the Earth instead of RSR.
It is so hard to say. My kids (8 and 11) love Mr. Toads wild ride, yet the have never seen the Disneys "Wind in the Willows". The "franchise" may also never die. Disney has a great way of re-juevinating their films, whether it is a planned rebirth (Princesses) or an Anniverary release, it is done very well. New Generations of kids always love the characters.