That takes even greater liberties with the legand...
Russell Crowe and Sienna Miller are playing the Sheriff of Nottingham and Maid Marian in the film "Nottingham" which will include a love triangle between those two and Robin Hood.
It's an interesting twist, although the idea of Marian taking a second look at anyone but Robin is hugely annoying to me.
Still, while I'd like to see a version that harks back to the good old adventure days of Errol Flynn and the like, it's not as though there's a "book" to be purist about. Robin Hood is a legand, with each generation adding something to the cannon. It just gets annoying when things sneak in that totally twist the original premise.
So, if it's not rated R, I may end up seeing this one. It's worth keeing my eye on, anyhow.