I agree with this. I don't think it was a joke, as such. It was the first name that came to him. He basically answered the question 'which of the champions around your weight do you think you have the best chance against?' rather than the question specifically asked.
He knew that it was being discussed as a possible fight and was a barb to AK, mixed with what TFFP and Cobbler said. He made up his own question and answered it on the show.