ToT and Dr. Doom are two very different experiences. Doom with a fifteen minute or less wait can be a fun ride. Disney's biggest mistake with ToT was changing the ending yet again. The better experience on ToT was when you would go into the drop shaft, drop to the basement then go all the way to the top and drop again. Right now they have so many drops in there the end effect is ruined, its like taking a ride on a hilly road, we get the point, the vehicle can go up alot woohoo. Actually a point alot of people dont know is the fact that ToT was originally planned to be an 11 1/2 minute ride, unfortunately disney cut alot out of it, what we're left with a good ride but nothing like it was supposed to be. Now as for Doom, like I said if it's a fifteen minute wait or less its a good ride, any longer wait than that and it can seem like a "that was a waste" attraction which is unfortunate. The video wall in the last portion of the queue has a very detailed video with very subtle but important details in it, Universal spent alot of time with the Marvel people researching and learning about the characters and alot of what they learned made it into the attraction usually in very subtle ways. As for making Doom go thru its launch sequence more than once, unfortunately it can not, it was not designed that way, after IOA opened the company that made Doom for the park came up with a new system that can do multiple launches, guess universal got there too early, haha. And as for the post saying tear Doom down and put something better in...that would be nice but personally I'd start with other attractions before Doom, Storm Force, Flying Unicorn, Triceratops Encounter, Pteranadon Flyers, etc. Compared to those Doom is a wonder attraction, hahaha.