In case you missed it in the livestream from earlier this week, it's Rodimus. He was visible on the title screen with Ironhide and Skywarp in the background as a teaser.
After Skywarp and G1 Ironhide are Slipstream, Rodimus, Sunstreaker and Soundblaster. The next bots after Sunstreaker and Soundblaster are Chromia and Dead End.