It's definitely not going to be a blockbuster, but with a star of the calibre of Tom Hanks I can't imagine it will be a low release movie either.
I did not know that, I'm kind of sad people across the pond never got to experience the joy of Rev. Rogers. More than likely it won't do well but maybe it will introduce people to Mr. Rogers and via the internet can learn more.
I didn't even know he was a reverend. I think the only reason I know him is through a pop culture reference on Family Guy or something.