Sure, the format of this tournament is much different obviously, so I'm not sure what the best way to do this would be. I would prefer to not have predictions for the final group stage or final playoffs until the 20 teams + groups are decided. Which means no predictions for qualification round, or a separate contest for the two. Or two contests but a combined "overall" contest too.
I'll try to come up with something soon, maybe by tomorrow night. Feel free to post ideas.