Dana isn't going to want Arona, mostly because he is not going to be a big seller. Everyone you named is pride. There not going to strip all those fighters. Arona would get knocked out by chuck. Rashad would get knocked out in the first round. Lil Nog would get beat. Soku and Shogun would both be great fights who i wouldn't be picking chuck in. Well i would against shogun just not Soku.
Contenders for Chuck if he beats Rampage. Jardine, would love to see this because i want to see Jardine get his nose broke. Chuck wins brutal KO about 2 minutes in the first round.
Rashad, he is not ready would lose again IMO first round.
Tito, already seen that 2 times.
Lambert would also go to sleep.
Lyoto, i think would be a good fight, kind of think Lyoto would make chuck look silly until chuck KO'S him. Its a fight i would chose Lyoto in.
Wilson, another guy Chuck would KO.
Bisping, I think he actually might make it into the late first round before getting beat.
Bonnar, same thing.
Vera, Vera wins this. He is better at everything then Chuck, well besides counter punching.