I'm not sure if they'll be bringing it to production cities, but we've been told already by Parizad that free green will not come to TC3 or EA-Land. She mentioned as of our last free green, that it would be the last free green. However, I don't know if this is because they expected merges to already be running.
So basically...
TC3 and EA-Land...we'll probably never have free green.
Production Cities...it is really iffy.