However, Loki debuted as a villain in the MCU, he was the first Avengers nemesis and with Doctor Doom being the new big baddie, it is quite possible that he might need Loki to fulfill his evil plans.

After failing to destroy the Avengers and being defeated ... Mischief to come to terms with his mistakes and eventually atone for his sins by helping Thor. Loki orchestrated many of Thors events ...