Most of this new Thor: Ragnarok trailer (posted by Cinema Today) plays similarly to the one that was screened at San Diego Comic-Con last month, but the beginning of the preview shows Doctor Strange and Thor back in the Sanctum Sanctorum.
But before the search begins, Strange tells Thor that he senses a great change in his future, and that destiny has dire plans for him.
From there, the trailer delves into the main story Thor: Ragnarok story points, i.e. battling Hela, getting into trouble on Sakaar, etc.
This scene appears to take place directly after their conversation in the Doctor Strange mid-credits scene, meaning they’re about to go looking for Odin.