This is the pissed off Loki that just got his ass handed to him by The Avengers.
Then here comes Avengers: Endgame, where Earth’s Mightiest Heroes use time travel via the Quantum Realm to go back into the first Avengers movie right after Loki had been captured in the penthouse of Stark Tower.
What sort of trouble is Loki going to get into now that he has the Space Stone?