I realise that this has probably been covered in other parts of the forum but my understanding is:
Rick tried to get the licence for Warmaster from GW but failed
Now he is doing his own new sets of rules that use a lot of the warmaster rules mechanisms
He has hooked up with Warlord games (good 28mm mini manufacturor)
He has released Black Powder (muskets and bayonets)
He is about to release Hail Caesar (ancients)
There are, apparently, going to be supplements avaialable in the future.
The rules support any scale of figure including 6/10mm.
I may be investing in Hail Caesar and a Baccus 6mm army of Romans.
Dave