ROTF Sideswipe has just been found at Meijer.
https://www.reddit.com/r/transformers/comments/pp14fm
Still not officially announced by Hasbro. Supposedly, he's in the next wave after Jolt, ROTF Bumblebee and Gnaw, who have 86 Jazz as the fourth figure in their wave. Sideswipe allegedly ships in a case with 86 Kup, 86 Blurr and B-127.