I think you can look for HS opening time to shift. What happened in previous years isn't helpful here because of the new land, and the after hours events going on. I expect it will be an 8am opening. We are late March/ early April and I am planning for an 8 am opening. To gauge what will likely happen with MK and AK, look at the DAH and VAH times. For example if the park is currently closing at 9 all week, but the DAH and VAH are scheduled to start at 10, you can be pretty sure the will extend hours to 10, at least on those days but probably all week. Park will definitely be closed by start time for these events, and I think at this point it is unlikely they will saty open later on non event days. They want to push attendance to these events.