Road Rage is red Tracks, right? If so, I can't imagine why he wouldn't be MP-25R or something rather than 26. I've seen a version of this rumour on Facebook where Road Rage was given a letter designation, so it seems to be morphing over the last day or so. Big pinch of salt.

That being said, I would've thought with Star Sabre and the Wheeljack repaint (whose name escapes me just now) due out very soon, we'd have a reasonable idea of the next MPs by now, maybe even some teaser shots.