James Franco was asked on January if this project was for "some time this year?" , and he said "after the summer". I'm getting worried that there haven't been more news on this, though...
The only musical confirmed for sure is "Dancin'" which will be opening shortly after Labor Day at Studio 54. "Godspell" also is holding auditions next week and is scheduled to open in the Fall.
"Man and Boy" and "The Mountaintop" are also confirmed for the Fall, and "The Columnist" will start January 4th. "Detroit" and "Death of a Salesman" (with Philip Seymour Hoffman) are also scheduled to open, but exact dates haven't been finalized yet. That's all I know of for now though.