Not sure if this was discussed, but it's on his official website and twitter.
Is Meghann Fahy still involved?
* Coming up next for me is a FULL production of Newsies at Papermill Playhouse!! Folks, I am literally living a childhood fantasy playing the role of Jack Kelly (originated by Christian Bale)... the nine-year-old me would be so proud. - Newsies @ Papermill Playhouse, Millburn, NJ (Sept. 15 - Oct. 16, 2011) Jeremy Jordan official website
Meghann Fahy is doing The Unauthorized Biography of Samantha Brown at Godspeed from August 4th-28th so unless she some how goes right into rehearsal for Newsies she will probably not be involved.