It's probably just me, but PRIME Bulkhead appears too soft to be a member of the Wreckers. Though he has been portrayed as a hard case (taking on Hardshell, slaying Starscream's clone) on the whole he's too much a gentle giant to be a real member of the black ops squad that form the Wreckers. I'd like to see a bit more of Bulkhead's past: how he became a Wrecker, whether he disagreed with them on their tactics, etc. A couple of episodes with Wheeljack shed some light on their faction, but not enough to explain their story other than they're getting killed off too quickly. I hope to see more of this in the future.