The Superman: Escape from Krypton plaza at Six Flags Magic Mountain was recently closed (here) due to the construction of their latest roller coaster, Full Throttle. There has been some discussion about whether or not Superman will reopen before the Full Throttle construction is complete. The park may have just answered that question indirectly by this recent update they made to their web site:
I don’t believe the park would have made this change if the ride was only going to be down for a short period of time while they put up some construction walls. This tells me that it will likely be down for awhile. What do you think?