What made the original Carrie work was how creepy Suzy Spacek (sp?) was already.. She looked the part already and acted incredibly in the role.
To do this again right (but since when has that mattered 'see the Amityville Horror remake with Ryan Reynolds'), they would have to find an actress who already has that creepy vibe... Putting a flavor of the month pretty face into the role ain't gonna cut it..
The sequel that Amy Irving starred in had its moments... Especially when she was offed toward the end.. Didn't see that coming at all..
So...Dakota Fanning, then?