I have mixed feelings about this. I'm a big fan of the Coens, and I love the original Ladykillers, but it's so quintessentially British in its humor that I'm not sure this can work all that well. My hope is that it'll work if it can be thought of as "suggested" by the original movie, or something like that, instead of a straight-up remake.
As much as I love Tom Hanks, and the original film, I'm not sure that's enough to make me put with the Coens... maybe they could get a block of wood to be the co-writer and 1st AD.