Nighthaunt got:
Not in Soul Wars: 9
Bladegheist Revenants, Dreadscythe Harridans, Black Coach, Kurdoss Valentian, Reikenor, Dreadblade Harrows, Lady Olynder, Myrmourn Banshees, Endless Spells
Alternate/full kits/repacked sprues of Soul Wars figures: 5
Chainrasp Hordes, Liekoron, Grimghast Reapers, Glaivewraith Stalkers, Crawlocke
Plus the Thorns of the Briar Queen for Underworlds so 15 releases in total.
Necrons got:
Not in Indomitus: 11
Flayed Ones, Chronomancer, Psychomancer, Void Dragon, Hexmark, Lokhust, Doomstalker, Ophydians, Szarekh, Terrain, Monolith
Alternate/full kits/repacked sprues of Indomitus units: 3
Necron Warriors/Scarabs, Skorpekh Destroyers, "Royal Court"
So 14 separate releases although one of those is an overpriced character sprue repackaged.
I would guess we'll see some of the sprues from the Kruleboyz side repacked as is whilst another 9-10 releases (including the Breaka-boss and Beast-skewer) plus at least one Warhammer Underworlds warband next season