I think its due to a few reasons:
1.) The maze once once to be at USH Hollywood I believe in 2011 But due to schedule issues, it got changed to Alice cooper.I might be wrong but that's from what I heard.
2.) The Puppets of Orlandos will be re-used for Hollywoods which if not in conditions for long periods of time, the puppets will get wrecked but hopefully the transition was seemless.
3.) Its more a Tribute/trade due to we're Trading Halloween for this from what it seems and I think it works out on both ends greatly.
Hope these awnser your question raff.