I haven't heard anything. If we are being optimistic that could mean the door is wide open for any and all suggestions. We could flood the forum with our 1/32 wish lists and see what becomes of it. I would prefer that they expand existing lines than to do 1 set from here and 1 from there and so on.
Armies of the two or three major participants. For the time period do the 3 branches of the army. Infantry, cavalry and artillery for the musket era. Foot, mounted and archer or slinger from ancients. Summer and winter guys from WWI and on.
It is not easy to post on the 1/32 blog thingy at hat. I do not know if Hatblogger even reads it much as there has been so little activity there lately. As he says "nothing has been ruled out".