There was a permit filed for the current stage, so it's possible that the location isn't moving after all, at least for now. If it's not and they're going to work on the stage, then of course they need JTA closed. I suspect, however, the real (or more relevant) answer is simple cost-cutting. Since they're "reimagining" JTA and re-casting it, they need to train those new CMs. Why pay double for two months (for both the current cast and the new cast) when they can close temporarily and have no cast-related expenses?