Who knows? The releases for Bret/TK had nothing to do with their respective Arcane journals. The rumor has it that Empire will be getting new knights and new free company. For the rest of the range there is mostly excellent plastics already (personally I hate the regular state troop models but that's me).
In the arcane journal I'd guess we'll be seeing some kind of "crusade" list, what the other might be I have no idea
Dunno if EMP will get anything, since if you look at what TK and Bret got, they either got new units that didn't exist previously KotR on foot (no, everything before 6E Bret were mistakes), Nekeph, Bone Dragon or updates to very old resin kits. Personally I don't see the point of a new Empire Knights kit -- they didn't release new KotR on horse kits and the EK kit was in the same style as those. Meanwhile the FCM are in the same still as the state troops, so lots of interchangeble parts, and IMO that's a good thing. The last Empire plastic range was a whole package that don't need changing.
For the "starter" factions, they released several resin character minis, such as the new "Handmaiden of the Lady", that named prophetess on a horse or unicorn, and two paladins on foot (one posing with a two-handed sword another a standard bearer).
sourceTK also got Nekhep holding up a scroll proclaiming for Settra on a tactical rock.
Provided they tie the other factions' release to the Border Princes campaign, then Empire has three representives there -- and none of them will get an exclusive kit, if prior patterens will be observed. Instead I hope we get a new "Jade Wizard" miniature since the plastic kit didn't come with options for neither amber nor jade wizards. There was that LoB wizard on foot resin kit circa 6E and of course that plastic one with the griffon kit, but Jade? Hopefully they add some kind of "Hedgewise" character who was trying to warn those three Empire guys in the Border Princes of Settra, or something. They can also make that a Taalite priest, I dunno, something.
If Empire gets a flame cannon, the AJ will just tell players to use a Dwarf flame cannon with human cannon crews -- that exactly how they did it with the Bombard