Two big trailers turned up online today. One was rather good. One was crap. I'll leave you to work out which is which.

Cowboys & Aliens 

The film that Aliens vs Predator wanted to be. Bit surprised by the serious tongue-out-of-cheek tone, but I wouldn't worry too much. Harrison Ford's craggy face looks near-demented and James Bond has nothing better to do, so there should be enough chemistry to stop this being the next Jonah Hex. And don't forget, this is from Jon Favreau - DIRECTOR OF IRON MAN. His mum must be so proud to see his name there for all of 0.02 seconds.

Green Lantern

Ryan Reynolds gets out of coffin alive. Finds magic ring. Becomes superhero leprechaun. The world groans.

Warner Bros are clearly aiming for Iron Man territory with Hal Jordan's flippant quips: "Make yourself at home - there's water in the tap," is crying out to be read by Tony Stark. Shame the effects look utterly naff. This trailer's online over at Apple. The film's out in June next year.