Shrek shouldn't have been here ANYWHERE near as long as BTTF. I would definitely be a bit more sad if it was originally a dark ride. Shrek 4D in Singapore is in the center of an entirely themed land just for the franchise. The elaborate atmosphere and great attention to detail would make you think that the main attraction is something worth while.. The key to a great ride is making the story timeless, which can definitely be applied to all the rides in the Lower Lot. Shrek's story, however, takes place right in between the first and second movie. Once you visit the attraction more than once, it gets very old very fast. In JP, you can venture through the world of the dinosaurs over and over. In the Mummy, you can escape from the clutches of Imhotep over and over. In Transformers, you can help battle the Decepticons over and over. In Shrek, Princess Fiona gets captured by Thelonius again and again and the same events just happen to occur every single time.
I think the saddest fact of reality is that the story just isn't exciting. In fact, when I was just a little tike, my mom saw a VHS tape in the store called "Shrek 3D" and decided to buy it for me. It came with little paper 3D glasses and everything. Little did I know, the VHS tape's video is the EXACT same video currently projected in Shrek 4D. I'm fairly sure the video was released prior to Shrek 4D's opening, but I could be wrong. Either way, it's just unbelievable.