Daniel Craig is not in Star Trek XI...yet
Well hold on a moment. First up the story from Worst Previews has TrekMovies carrying a WENN story and are quite right to point out that they can often carry rumour heavy stories. However, there's something more, the story itself is a quote and when you read the quote it's quite clear that Craig is saying he would like to appear in the film, and it could well be in response to a direct question. Here's what he says:
"I would love a stint in the (Star Trek) TV Show or in a film. It's been a secret ambition of mine for years."
You can just hear that rolling off the tongue after a reporter asks "How would you like to appear in the new Star Trek film?"
The film is nowhere near the casting stage, after all they have to finish the script and Abrams to decide if he's even directing before they start looking at casting. Mind you, I wouldn't be surprised if there are some names in there unofficially, I'm sure Abrams has some people in mind for the moment he decides if he's directing. However I'm sure this is total speculation and misquoting of Craig.