Working together with Solstice , M'gann defeats her old nemesis Sun Girl .
Along with a number of other former Titans , M'gann returns to assist the team during their final battle against Superboy - Prime and the Legion of Doom .
Working together with Solstice , M'gann defeats M'gann 's old nemesis Sun Girl .
Along with a number of other former Titans , M'gann returns to assist the team during their final battle against Superboy - Prime and the Legion of Doom .