I have never seen a Warner Bros. Blu-ray which was region locked. I buy many many Blu-rays from the UK and most of them are Warner Bros. and they ALL are region free. I really doubt this flick will be any different. Once it is released, Blu-ray.com will have all the details.
I never saw this in theaters. It didn't get good reviews, but I was still going to pick it up on Blu-ray. Is it any good?