Loki is definitely the villain who comes to mind when thinking about characters who love lies and misdirection. Marvel just likes to create surprises using the villainous method in their movies by having their actors say one thing to the media, while another happens on the big screen. Most recent example is when actor Guy Pearce said his role in Iron Man 3 was very small but then he was revealed to be the main antagonist.
In November's Thor: The Dark World, Loki is back along with the introduction of the Dark Elves and their leader Malekith the Accursed. Actor Christopher Eccleston plays the Dark Elves' leader and recently spoke to Total Film (via CBM) about a potential team-up with Loki—one that many fans have theorized could happen in the Thor sequel.
“I've got to tell you, there really isn't that big a connection actually, when it finally plays out. A movie comes along with a baddie, and then [for the sequel] you add another baddie to that mix. But in terms of Malekith and his maneuvering, there's not a huge amount of screen time with those two guys together. There's an implied connection—which Loki plays with—but it's not hugely developed strand in the film.”
Sounds like a bit of misdirection and possibly some more lies to this writer. But it's okay because we're talking about a hopeful on screen team-up with the God of Mischief and there could be some mischief in between the lines of Eccleston's comment.