Headmasters and...?

Hey TF community!
Forgive my nubness..but I have a query for all you moar experienced bot collectors...
I was surfing through a grand selection of toys looking for cool little stuff to buy (for some reason I am on a major mini-con kick) and I run across the Junkion Blacksmith headmasters which have like 4 new bots out for pre-order (the only existing one being a Megs-head version), and I was wondering....
What MAIN bots are these supposed to go with? Are they primarily supposed to be used with G1 Headmasters (I had a few of those as a kid and remember how they attached...with the chest panels that would reveal their "stats" when you stuck the head on). I havent seen or heard of any modern headmaster remakes or reissues, so I wasnt sure...or are they designed to be used as a generic head for any bot (like, do they come with a generic pivot-point on the underside so they can be stuck on the neck-ball joint of most bots?)
Any clarification would be Awesome!
Forgive my nubness..but I have a query for all you moar experienced bot collectors...
I was surfing through a grand selection of toys looking for cool little stuff to buy (for some reason I am on a major mini-con kick) and I run across the Junkion Blacksmith headmasters which have like 4 new bots out for pre-order (the only existing one being a Megs-head version), and I was wondering....
What MAIN bots are these supposed to go with? Are they primarily supposed to be used with G1 Headmasters (I had a few of those as a kid and remember how they attached...with the chest panels that would reveal their "stats" when you stuck the head on). I havent seen or heard of any modern headmaster remakes or reissues, so I wasnt sure...or are they designed to be used as a generic head for any bot (like, do they come with a generic pivot-point on the underside so they can be stuck on the neck-ball joint of most bots?)
Any clarification would be Awesome!