Lar Gand (you know him as Mon-el)
Pre-Flashpoint. No prep. In-Character. Standard gear. Win by KO or kill but not by BFR. No Lobo (he can't be in two places at once).
For their crimes of um, slaughter, the intergalactic police force L.E.G.I.O.N.'s strongest members intercept the Slaughter League. Totally random encounter. Who and WHY?