I emailed my local (well, most local) Alamo and this was the response i got:

[…]
It has definitely NOT been cancelled. Our corporate offices are currently preparing web posts with updated information about the show. […] Due to slightly bizarre screening legalities, the STAR WARS films cannot be played at primary movie-screening venues like the Alamo so that’s why we are forced to think a bit outside the box on this one.

Tickets will go on sale sometime on May 4; we don’t have an exact time pinned down for that quite yet.

When we know more specifics, we’ll be sure to let everyone know. But it’s still moving forward, so fear not! For that is the path to the Dark Side. 😉