TBS’ Conan and its host Conan O’Brien will return to Comic-Con next year, the network confirmed tonight. It will mark the third year his late-night show will tape from San Diego during the convention. This year, O’Brien’s show taped in the afternoons at Spreckles Theater from Wednesday through to tomorrow, when he wraps his stay with the cast of HBO’s Game Of Thrones. Tonight, Conan hosted the cast of Suicide Squad — including Will Smith, Margot Robbie, Jared Leto, Cara…