Into the Woods is long overdue, and I'm glad it appears that it's going to be made. Company would be great, too.
Shenandoah would be an excellent musical on the big screen. I though it was going to be revived on Broadway a few years ago, but it fell through.
I would love to see A Chorus Line remade. The 1985 film SUCKED. They cut out some of the best songs (Hello 12, Hello 13, Hello Love and The Music and the Mirror). It should be done in its original time period (1970's) and leave the score intact!
ETA- I actually enjoyed the musical version of The Full Monty better than than movie, despite the change in location (Buffalo, NY instead of northern England). I wouldn't mind if it ended up on the big screen.