That one is on the top of my list since it was announced Bong Joon Ho spoke to me on a personal level. I love Snowpiercer. And as far as I'm concerned, his filmography is perfect thus far.
I read interview of him saying that he wants to focus on smaller projects now (which is well...good) and not something bigger in the scale of Snowpiercer (which is a shame too) Must be burnt out from all that drama with the Weinstein bros.