User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-27191767-20151211151049/@comment-26336535-20151212174513

There are no exact dates when it comes to updates for games, unless they are truly on top of things and it's only a few days or a single day till the update. If you haven't noticed, the new RS units don't all arrive on the same day of the month. Just expect the new units to come around the last few days of December, give or take a week.