There are now 2 TS in Mexico. San Angel Inn and the Hacienda, as well as 1 CS (the Cantina).
I've not heard anything of San Angel having any updates while Hacienda was being worked on. Now, I've no inside knowledge to see if they have planned anything for after either, but if anything, I think that would be the way it would go. Wait until Hacienda opens and is settled for a while before making any updates to San Angel. Again, I've heard nothing that they plan on making said changes to San Angel, but if they would, I'm sure they would want to wait until after the Hacienda / Cantina opens.