I know Cena's been marketed all over for the chamber and to face Cody
But Drew and Punk are the best candidates to win the chamber and then take Rock's offer that Cody turns down, as far as two people who badly wanna be the face of the company. Drew been taking a lot of L's and could take Rock's offer (can call back him re-signing and Rock gifting the sword) or with Punk we know he desperatley wants the mania event (the favor is Heyman goes to the family of Samoans) and be the man and play up the whole Punk is a sell out dialogue which something the IWC argues about anyway.
You could do it with Cena but hes established and in the final year and should be chasing for it. Seth already did this with the Authority. Damien maybe but no sizzle, Logan Paul is too much of a heat magnet and part timer.
We'll see what happens but I feel whoever wins the chamber and beats Cody, has a whole line of people who can come after him and be protected