I find this news most fascinating, and am eager to hear reports from Melissa and others once they have seen this. I am actually (generally) quite a big fan of alternate artistic interpretations of the same source or story, and I have no problem with others tackling Annie's story with their own angle or vision; it's just important, as David states, to see the play as its own entity, and not indulge in fruitless comparisons with Ang's film adaptation.
I do note that the actors playing Jack and Ennis seem a bit less glamorous than Jake and Heath, which to my mind is actually a positive element (Annie's characters are distinctly lacking glamor). Also, judging from the production photos, a rather stylized approach is being taken with the material, no doubt resulting from the distinct parameters offered by the theatrical experience. I imagine the story is being treated like a memory play (a 'ghost sonata', a la Strindberg), and this would be most appropriate in light of the mood of the original story.