If ROL is showing I will gladly throw out my plans for the evening to see it. I'm not banking on it though and am planning as if it won't be showed. Every week someone says it'll be showing in a few weeks and it never materializes.
There's been a lot of guesses over the past few months and they've all been wrong. Safe to say it'll be open by the time Avatar Land opens. So that's my guess. Call me conservative at this point.
Interesting - an extra hour each night. It would allow for at least two showings - one at 7 and one at 8 with 20 minutes to clear the theatre and 20 minutes to set the next group. Who knows?