The choice of the Imperial is quite a propos given the name of the house and the timeframe/ setting of the piece itself. Am sure it's just a happy coincidence.
Given the short turnaround, as it stands, between LES MIS coming out and NATASHA etc coming in, I wonder if the former may in fact come off sooner than advertised. It hasn't exactly been tearing up the Box Office of late, and there is no star name attached. If this were to happen it would be the second time that they've done this to John Owen Jones, as his stint as Valjean in the first revival at the Broadhurst was cut short by early closure. I hope this doesn't occur but it just doesn't seem feasible to load in Natasha in such a short period of time, especially if the Imperial is going to be adapted in some way to bring it in line with earlier venues for the show.