Now as for the still wondering and guessing on the new kits, 'the Great War' (aka WW I) would be pretty easy to find six combatants for. The Germans, English and of course the French alone would fill half that and this would only cover part of the nations in the early years. Theres still the Italians and the Austro-Hungarian's to name a couple, before even listing the Americans which finally joined in the last year and that brings the total to five different nations.Or.. if you think of it, if they chose to 'leave off' (for now) WW I cavalry, they could do both infantry and artillary for just the 3 major participants of the early years of the war (Ger. Eng. Fr.) and that would be the mentioned "six kits".
My take is it's six boxes, which could mean two or three factions for the Great War such as an infantry set and a command/support set for each. For example:
Great War German Infantry set - that would include extras for converting the basic infantrymen into stosstruppen (ie., extra grenades, grenade bags, MP18 submachine guns, and an MG '08 with bipod or a Lewis Gun with spare magazines.
Great War Germans Command & Support Set - Platoon and company command figures, MG '08 with three gun crew, light Minenwerfer and three crew, plus flamethrower for converting infantry figures in basic set to flamethrower team.
Great War British Infantry Set - including extras like hand grenades and grenade bags for bombers, Lewis gun and magazines, assorted improvised hand-to-hand weapons and a double-barreled hunting shotgun for converting basic infantry to trench raiders.
Great War British Command & Support Set - Platoon and company command figures, Vickers .303 machine gun and crew, Stokes mortar and crew
Great War French - Infantry Set includes extra such as grenades and grenade bags for bombers, Chauchat automatic rifle and spare magazines for No. 2, 2 Vivian-Besseires (VB) rifle grenade launchers mounted on a Lebel rifles, spare rifle grenades, and a small assortment of improvised hand-to-hand weapons and revolvers for converting figures to trench raiders.
Great War French Command & Support set - Platoon and company command figures, Hotchkiss M1914 machine gun and crew, Stokes-Brandt mortar and crew, and a flamethrower space allowing to convert infantry figures to flamethrower operators.
These would cover the major combatants of the Great War on the Western Front in a very thorough fashion in 28mm IMHO.