Originally Posted by Hyde
They could have ended it like everyone thought it would in the cinema, with Odin talking to Thor and then cut to a wide shot of Asgard or the Nine Realms or whatever. At first I was suspicious that Loki was actually dead, then as the movie went on I actually started to believe he was. It would have been way more effective had he actually died. If Marvel wanted to bring him back then they can do it in Thor 3 with the incredibly-likely Raganorak stoyline.
But the cliffhanger actually makes Loki's "resurrection" (for the lack of a better word) more poignant.
If they had simply brought him back, either at the end of this movie or in Thor 3, the relationship between Thor and Loki would have come to a point in which it would have been frozen.
This way, you allow the character of Loki to continue growing, by exploring more of his psyche and motivations beyond what we've seen until now.