I don't think there is an agreement with UAW to move anything to Flat Rock yet, which is why I was speculating we won't hear anything concrete about it until September (at earliest) when the current contract expires. Everything I know about moving anything to Flat Rock is just very strong rumor at this point, and has been backed up by Robert Lane and (i think) akirby. This is the "where there's smoke, there's fire" type of rumor so keep an eye out come fall and we should have more of a solid idea of what's going on.
Same goes for the Lincoln compact sedan I've referred to here a few times. Not much rumor about it on the floor at MAP, but I've heard so much rumbling elsewhere about it, there has to be some truth to it in the next 1-2 years. Maybe around the time of the reveal of the next-gen Focus.