Question about the release of skins in the store

Did the developers talk about something about the release of skins from old pre-orders in the store? For example, there was Jaraxxus and Nzoth from pre-orders( for 1500 gold), how soon should we expect Denathrius or Renatal, Deathwing? Is there any logic behind these skins?

I don’t think so, just check the shop every Tuesday. They change these hero portrait offers on this day, as far as I saw.