I'm not writing any letters, and here's why:
IT DOESN'T MAKE SENSE.
I'm only about 40% convinced that all these rumors have anything to do with the REAL B5 movie that's being made. It makes NO SENSE for Warner Bros. to take a franchise and make a movie made up of characters we either barely know (Galen & Lochley), or don't know at all (everyone else).
It'd be like Paramount making "Star Trek: The Motion Picture" based entirely on the lives of a completely different crew, with Harry Mudd thrown in as the previously-recurring character whom we liked but didn't know much about, and maybe a cameo by Dr. McCoy.
JMS admitted he had to do a great deal of re-writing after Rick Biggs died. Why would Rick (and Tracy) be a part of a big-screen movie, and not their B5 compatriots?
IF IT *IS* TRUE...
If it is all true, there will be no delay in shooting for a complete re-write of the script. There will be no time to get the B5 crew on board. The movie will go ahead as planned, re-cast or not, and it will bomb.
Don't misunderstand me -- I have no doubt that it will be well-written. I've been reading JMS's Amazing Spider-Man issues this week and they are some of the best writing in a comic book series I've ever seen.
I want the movie to be a success as much as anybody else, but if all this truly is for real, and Lochley is the only face people will recognize, the movie will bomb, no matter how well the story is written. Even if Peter Woodward were able to change his schedule and return as Galen, it would be fantastic news... but while it might improve the movie some, it still doesn't excite me much. I had only 13 episodes and a TV movie to merely begin to understand Galen. I had five years to watch the B5 cast evolve.
If what we've all heard & read is true, no letter-writing campaign will change the fact that the movie will be full of faces we don't recognize. They will be characters we don't yet care about, and 2 hours in a theater ain't gonna get that job done. JMS knows this, which is why it's so hard for me to accept all the rumors as truth.