User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-5159732-20120806212401/@comment-99.55.67.73-20120813043256

I did research on this, actually on the DC Wiki, which hasn't always steered me straight, so take this with a grain of salt. Black Beetle at the end of the video is *supposedly* Blue Beetle from the future turned bad by other time travelers, who form this evil time traveling band that Booster Gold fights. I'm not entirely sure how that info works with Impulse, but the idea of two unrelated time travelers working against each other seems unlikely.