Maybe if the new show is a success it will be come back after Frozen Summer Fun 2016 from September until Nov then for Xmas Frozen Sing Along returns and then this show returns afterwards so they alternate. It sounds like it's going to be a great show.
I'm going near the end of January so i'll probably miss any soft openings too as it's the week before the end of January. Gutted!!
How about they just keep Frozen for Christmas and have this new show on the rest of the year? That would be better IMO.