oh i know how the platform will be lifted and lowered but I really doubt they would be lowering it and lifting it for quarterly shows. Quarterly shows would mean that the platform would be lifted and lowered 8 times per hour. i do not know how fast or slow it would take to do it but it does not seem like they would do it for something so large unless they only lifted one part of the platform
I could see them doing a couple shows per day maybe lasting five or so minutes. Something that would just happen without to much announcement so that it would not create huge crowds. It would just be something to add some life to the bay during the day.
I know that they are saying that the show will happen at the end of the day similar to how the show in Epcot is done. A way of closing the park with a bang but some time ago they were looking into the possibility of doing two shows.
If the show is extremely succesful they will have to rethink that. A park that could potentially have 30,000+ guest at one time with a show that has a viewing area of 9,000 could be a problem.
The issue is if they could come up with a way of doing two 25 minute shows without disrupting the flow of attractions in that area so much. They really need to consider adding more attractions in other areas of the park very soon besides Cars Land. They also need to consider a way of keeping Screamin running even if it means coming up with a way of protecting the launch from the shows effects.