My predictions for the Darkoath/ Everchosen/ STD release are:
likley:
Darkoath barbarians- replace the marauder kit, Great weapons or hand weapon and shield, could be a dual kit with ranged Darkoath, Bows/ Javelins but more likely 2 kits (see Idoneth Namarti)
Mounted Darkoath - replace marauder horsemen, hand weapons and javelins
Godspeaker - new Darkoath wizard
New Darkoath hero of somekind, mounted on a monster or riding a chariot (warqueen on chariot Boudicca style)
Varanguard on foot - replace chosen as the heavy infantry of the army
Sack off the rest of the resin hero’s and make options in both the varanguard kits to make champions of the Varanguard as hero’s
Terrain - not sure what this could be
endless spells - 2 Darkoath themed, 2 Everchosen themed
Unlikley:
New chaos warrior sculpts that are less static
new possessed (jealous of the new 40k ones)
New hero for each other god that’s both demon and mortal similar to the gaunt summoners (could be existing heros, Deathbringers, Harbingers of decay, ones that are slightly demonic already)
new demon prince kit feat. Belakor, Archaons greatest general/ nemesis as well as a heap more weapon options, Sword, Axe, Spear, shield.
Extremly unlikely:
Return of the mammoth
with all the likley options added in it should cover most bases giving the army a range of infantry, Calvary, hero’s and Behemoth’s, including a few support pieces and plenty of wizards