I know that IDW has plans for Grimlock, hence me not touching him.

We do know that Overlord drove Grimlock insane. It says so in Last Stand. I am guessing they will probably have him show up, be crazy, kill people, get talked down from being crazy, and then be surly and still kill people but not in a crazy fashion.

Anyway, I see that Landmine is pretty much Indiana Jones? So he can totally be out prospecting Cybertron for treasure. And strike it rich. And then Swindle will try to buy him out. Drama will ensue!

Heck, Landmine can find more of those pretty exploding rocks that Scavenger found.

Everyone wants exploding rocks. I bet they cost a fortune.