Quote:3. The movie lacked tension because there was no visual indication of what Loki was planning other that claiming to have an army. We have no clue what's coming until the portal pens and the alien race comes through for the climax. It was hard to care about what might happen to the world and our heroes when we're so in the dark about what's coming.
For some that is the tension. You don't know what is coming so it could be anything. There could be millions Cthuari coming through. They could have tanks, ships, who knows what.