'You're Next' team on the remake
http://www.thewrap.com/the-guests-adam-wingard-simon-barrett-to-tackle -i-saw-the-devil-remake-exclusive/
'You're Next' was good but this is going to be a huge waste of time even beyond the usual foreign remakes. 'I Saw The Devil' works as well as it does with stylized directing, extreme violence and two good performances from the leads. It's an exercise in style (not that that's a bad thing).
There are really only two possible things that will happen (since their intentions are basically to just 'port' the original):
1. They end up making a mainstream film for a wide audience, thus watering down the film and making it a pointless exercise.
2. They don't tone it down, it's extremely violent, and only a small group of people end up seeing it, thus defeating the point of getting it to a wider audience and, again, making it a pointless exercise.
There's simply no way you can take a film ISTD and tool it for a mainstream audience. Heck it was too extreme for South Korea.