I can confirm that the Final Boss fight
, which is an actual Boss fight and not just the RTS(Rock the show) battle. Before the boss fight
you must fight Doviculus in the RTS where the main objective is to attack two of the heads so they will bow down. Then you must drive the Druid Plow threw the heads glass
True, RTS does stand for real time strategy. With its rock show battle format that looks like an Real Time Strategy I figured Rock the show makes more sense.