Dungeon World was a big flop for us... and I'm excited about the next edition. :P
I think it flopped largely because we were playing it wrong. I know that sounds stupid, and you usually hear that from people making excuses when people don't like their favorite game. What I mean is that we tried to play it like D&D, and while it's clearly trying to bridge the gap between PbtA games and D&D-type games, you have to approach it a bit differently, which we didn't. Maybe I still won't like it, but I want to reevaluate it on its own terms.
I'm also a big fan of Burning Wheel productions. Burning Wheel is my favorite game I've never played, just because there are so many things I find interesting about the system, and I love the presentation. (Still trying to get a group together, though!) If DW2e takes the form of a chunky, digest-sized hardcover, I'd be thrilled.