Thor undergoes one of the biggest transformations in Endgame and manages to find some closure regarding the death of his family, thanks to a talk with his late mother (there's seriously a lot of time travelling). He gets his mojo back just in time to join Steve and Tony in the battle against Thanos and gleefully accepts the former's use of his beloved hammer. When it all dies down (is it too soon to use that phrase?) Thor decides to leave New Asgard under the leadership of its new Queen, Valkyrie, and joins the Guardians of the Galaxy. Fingers crossed he shows up in GOTG 3 — we would totally be into a MCU adaptation of the Asgardians of the Galaxy comic run.