We probably won't be seeing it this year since there's no time to hash it out but I think SEN might need to consider Tenz playing secondary duelist on maps where Zekken plays Jett.
Zekken does not look nearly as comfortable entrying on Jett as he does on Raze and with the return of Haven, Pearl, and the addition of Abyss, it looks like Jett is going to be more dominant in the upcoming meta.
Having Tenz play Yoru, Neon or Reyna to help ease some of the pressure off of Zekken on Jett maps could be the key for SEN. Put Zellsis on Controller, Sacy stays on Initiator and JohnQT stays on Senti.