When it was confirmed that Loki would follow the events of the fourth Avengers film, it was just a question of what his subsequent journey would be.
During this time, Loki stole the Tesseract and, after making off with it, he went through a portal and wasn’t seen again.
Fans may remember that in Avengers: Endgame, the heroes time travelled to 2012 New York to gather Infinity Stones in order to ultimately bring back those Thanos killed.
And even with the trailer, it’s hard to predict what’s to come.