Claw Jaw (not that he seems to be on here though).
While not on the cover, Claw Jaw most certainly is in the new Beast Wars series, since he does appear in the Gathering. Pretty much everyone who appeared in the American toyline that didnt' appear in the show, save for Magnaboss and Tripredicus, and TM2 Iguanus(he appears in regular form though) makes an appearance in The Gathering. You do have to kinda search for Scarem though, as he appears in one panel only.
And Claw Jaw is definitely one of my favorites. I hope they give more characterization to the Maxi's and Preds instead of introducing a bunch of new guys. Kudos to Furman for making Optimus Minor a major character, as his figure is underated.
If Leo Prime does come to Earth this time, I suspect a battle of leadership. Razorbeast was a surprising leader in the Gathering, but I don't think Grimlock would take orders from a small and underpowered guy like him(even if he is smart and crafty). But Torca had a hand in rounding up the Maximals, and probably led them along the way. Agh! It seems like there are four possible leaders here!
Oh yeah, and since it's technicly on subject, could the single DW Beast Wars story that appeared in the Summer Special couple years ago be considered canon in the IDW Beastverse? It fits with the established timeline, the characters fit, and there's no reason why Optimus Primal, Bonecrusher, and the wolf(name escapes me) couldn't have found a way to temporarily enter the regular timestream to save Rattrap from certain doom. They could have been on patrol or something and spotted him.