Jennifer Maas TV Business Writer“Supernatural” alums Jared Padalecki, Jensen Ackles and Misha Collins made the crowd go wild at the CW network’s upfront presentation Thursday, when the trio walked out on stage together to “pitch” network boss Mark Pedowitz some reunion ideas.Padalecki was there repping “Walker” and upcoming prequel “Walker, Independence,” Ackles had come out for “Supernatural” prequel series “The Winchesters,” and Collins was present for “Gotham Knights” — but all they could think about was finding a way for the three of them to work together again.More to come….