Err...yes?... I guess my question was will hte Mistborn book that is going to be released in December have material to play in the Alloy of Law era as well as the Final Empire era?
Ah, I see. Then the answer is no. The core Mistborn Adventure Game line focuses exclusively on the era of the Final Empire. We'll be presenting the Alloy of Law era in a follow-up supplement for the game, and that may
see separate expansion as well (we're still debating whether it's necessary, and we probably won't come down on one of that argument or another until we're deep
in that supplement's development).
There will be a full range of Final Empire support supplements, however, and work on those is already underway.