I for one loved Rocket's mom the first time we saw her. Mom: These the kind of losers you hang around with now, Runt? Rocket: Ma, these are my friends. Anyway, it's more continuity from the season 1 episode. That episode ended with Rocket looking at the holo-picture on his wrist device, so it makes sense he wants them back, and I presume that things will not work out so well for Rocket.