I knew I wasn't imagining the SB3 connection, but now the odds that the game will have on foot battles agains the Fives are that much lower...
Ah, a few interesting things about all that artwork:
I suspected this, but it seems Pretty Bomber has an animated cybernetic lines effect going on for her mask.
Golem Bomber still has his animated eyes, they just changed the default form.
SB3 had the main characters leaving a space station on a ship; with the above comment, we can surmise that R is going to have a similar premise. Also, that little UFO looks a lot like the one Bugler uses in that game.