Guarantee to happen base of teasers: The rest of Soulblight, BR Kragnos, Beast snaggas, and Sister of Battle.
most likely extra reveal based on banners: IDK warband. Space marines, SCE, something Necromunda, AoS 3.0
not entirely sure it be this week: the Destruction side of the new edition, Warcry, Blood bowl, or Aeronautica