I am really surprised by this announcement, since I think that the film version of Fiddler may be the best musical adaptation of a Broadway musical ever. It was well reviewed at the time, and I believe its stature has grown over time. If you are going to remake a Broadway musical, I can't help thinking that it would be better to remake something that was a flop in its first iteration, e.g., Rent, Mame, Man of La Mancha, ALNM, or has not aged well, e.g., Oklahoma or TKAI; or, you'd better have a great concept that veers away from the original film. Since the movie version of Fiddler is just about perfect (Norma Crane was 'meh' and Molly Picon was a little too Borscht Belt, if enjoyable), it makes no sense. I actually like the movie more than there staged version (and I saw it with a pre-ad-libbing Zero Mostel, among other times).
That said, if it turns out to be as good as the original, I will happily plunk down my money to see it.