Currently I'm betting on:
Peter Wildoer is the guy. The JLB solo tour is canceled, because Dream Theater are going to do warm-up tour with Peter where they'll also play some of the new James LaBrie songs. While this songs like a disappointing move at first, it's really not because ticket sales were probably not great and because most of the JLB fans really want DT instead, regardless of how great the new JLB album is.
That's just my guess, and kind of my wish.