4. Loki Won't Return
Despite the very obvious loose end of Loki being on the throne in Asgard in disguise as his father, nobody seems to be particularly sure whether the character even has a future in the MCU.
The Evidence The last time anyone asked Tom Hiddleston about Loki's future,
he literally said he didn't know if everybody hadn't just had enough of the character. That should be a matter for concern for any of his fans. Surely the character - and thus Hiddleston - would be a lock after what happens at the end of The Dark World? Is he just holding out for more money? Or to see what direction the film is going in? And how the hell would the MCU survive if one of its best actors simply up and walked off?