Luke Walton Says He's Down to Be in 'Space Jam 2' if LeBron Asks

[[tmz:video id="0_xfloemmi"]] The Tune Squad is gonna need a coach ... and who better than LeBron James' coach in real life -- Luke Walton -- to lead the Looney Tunes to victory in the "Space Jam" sequel?! TMZ Sports asked the Lakers coach if he's down…