A big question on my mind right now is how the C9 superteam will function comp wise. Of all the rosters, be they confirmed or rumored, this is the only one that has 2 high fragging primary duelists: Leaf and Yay.
I assume if someone is going to take chamber, it's definitely Yay (that's a no brainer). That might leave Leaf as another primary duelist + entry or potentially another flex; the best comparison I can think of is the dynamic between f0rsaken on chamber/jett and Jinggg on raze/reyna.
This does pose the question: what will Zellsis' role be? with 2 high fragging powerhouses on the team, each potentially taking a duelist spot, I doubt he'll be put on Neon to entry like he did on Sentinels. More likely than not, I believe he'll be resigned to a primary initiator/flex alongside xeppaaa.
vanity will probably remain as the dedicated IGL and smokes player if this is the case and Xeppaaa will probably remain a flex.