User blog comment:IiLiFa/Young Justice: Invasion 208 Satisfaction images preview/@comment-4772871-20120928215320/@comment-99.55.67.73-20120930204605

For the sake of devil's advocate (devil's, not unholy), I'm gonna accept the premise that Robin does do the leading of the mission back in time.

Why? Because there wasn't any time, because Nightwing was elsewhere or else outed as a "traitor" for his communications with Aqualad, because he was the only one with information, because Nightwing had to stay behind and take care of who was left.

How? Bart Allen traveling back in time and altering his past was a time-traveling no-no. Maybe there was some big event in the past that had to be stopped before a time paradox formed and annihilated everything. Something like a devil's alliance back in 2008 that Speedy was investigating right before he got kidnapped by Lex Luthor, maybe?