Which of the ‘special’ mission bosses should be included in Boss Rush missions? (You can choose more than one).
Bear in mind that the Boss Rush mission may use a different environment that the boss’s ‘native’ environment (for example, Alien Mothership will appear without the green retro starfield)
I suggested it earlier, but non-native bosses could have some intro sequences. Perhaps even some with dodging?
Something like the Alien Mothership coming out of a black hole appearing, multiple comets passing by to reach Henlley('s comet) or even some explosion for Bossa Nova.