J.J. Abrams says he is now completely focused on 'Star Trek 2'.

The highly-anticipated sequel has had its release date pushed back from summer 2012 because of a number of factors - including Abrams working on other films such as 'Super 8' - and the director has revealed he is now ready to put all his effort into making the film.

He told Collider.com: "There have been a lot of things that we've been working on, a lot of important elements that we just know we need to really nail down and solve. Once you say, 'We're ready to go, but we don't have a finished script yet,' or 'I'm directing the thing and here's the release date, but we don't have a finished script' what starts to happen - and I've seen this happen with a lot of friends of mine - is that you're suddenly in production on a movie that they're thinking, 'Oh my god, we weren't really ready. We thought we'd get it done in time, but we didn't.' So, while we have a moment to say, 'Let's get the important things figured out,' then all the pre-production stuff will come.

"But, I just want to make sure that we're putting the story and the characters, the cast and the crew, and most importantly the audience, first before we start talking about exactly which locations we're going to be shooting at and what the wardrobe and visual effects budgets are. It just seems important that we get the important stuff right first."

The film - starring Chris Pine as Captain Kirk - was initially planned to come out in summer 2012 is now believed to be pushed back until at least December of the same year.