Comcast buys Warner or Warner buys Paramount? The next big media deal is inching closer.

The talk at Cannes Lions points to big dealmaking on the near horizon.

Ketan Mehta, the ace Allen & Co. media banker is about to get busy again. 

With the investment bank’s July 4 mogul camp kicking off in a matter of weeks, Warner Bros. Discovery CEO David Zaslav and Co…