The same attractions are open all week, and they rotate every week. For instance, one week they will have Gotham City Backlot open (Ninja, Batman, & Joker), then the next week will be Hurricane Harbor (waterpark), next week will be DC Comics Plaza (Log Flume, Scrambler, and Looney Tunes Town), and it keeps switching like that. I'm pretty sure that those are the only sections open early that rotate, but I'm not exactly for sure.