Totally biased and BS comments notwithstanding, I'll assume that the movie will be around 110 minutes.
Ok, I'll just say this, X3's running time, from what I've seen, had very little to do with any particular person from FOX studios. The deleted scenes from X3 was nearly 20 minutes long and we know now that the reasons why they were deleted were entirely up to the director and writers. So, from reasoning, a shorter movie was purely under their control, and not particularly the studio. We also already knew that Brett Ratner publically has gone out many times stating that he has ADD and really has problems with longer movies. So, there's where the blame should go to.
It's strange...I didn't hear anyone complaining to FOX for X2's 130 minute running time and bringing up the "shorter time for more showings" logic. As if they were a different studio 5 years ago.
I've work at a movie theater for quite a time and let me assure you, there is no narrow window determining the number of showtimes a movie can have, due to open/close standards across any particular movie theater. So, 15-20 additional minutes of film typically makes no difference in how many showtimes a theater can fit in. I'd say, around the 2 hour 15 minute mark is where it starts to become very difficult for theaters to accommodate maximum showings. Movies near or below the 1 hour 30 minute mark are usually the only movies that could fit in one more show, but these are usually G or PG movies since they typically have shorter preshow advertisements and trailers.
Another very important factor in what determines a number of showtimes is the number of prints a theater receives, which also has NOTHING to do with the running length of the movie, but actually is generated by tracking numbers. Movies like TDK, that were tracking exceptionally well, may send a theater up to six prints of the movie, whereas a low tracking movie like Not Easily Broken will only send a theater one or two (depending on the region/demographic) or maybe none at all.
-TNC