My youngest has migraines (and a whole host of other issues), and last trip, we went to the Lion King show at DAK. We had to leave early, as the bright lights and loud noises triggered a huge migraine. I had to take him to first aid so he could lie down after taking his rescue meds. So that's a show that you may want to keep in mind I guess!
PS: the first aid folks were SO kind! They gave him and me a private room to both lie down (I napped), then when we got up they gave him water and powerade to go.