Spoiler:
I'd be cautious about spoilers. I already figured that they were shinigami since it made sense. Otherwise they would have been random people that gained shinigami powers and then gained hollow powers. I just was a little amused to find out that they were captains or vice-captains, but if they weren't then they would hardly be even a challenge for Ichigo and the Arrancar.



I'm just waiting to see them do something more than just sit around and train Ichigo. They seem uninterested in actually aiding Ichigo's fight in Karakura town against the invading Arrancar. The Vizored have to be at least as strong as Ichigo or any other Captain if not possibly stronger. So they should be able to take on the higher class Arrancar without much trouble. Bet they could show Grimmjow a thing or two. I figure that Tite is waiting until they are desparately needed or something, but apart from Aizen they could probably deal with everyone else that Aizen throws at them.

Tonight I believe that Ichigo is going to be getting close to fighting Kariya or whatever his name is. It should be coming soon since Hitsugaya beat up Koga pretty easily. It was sort of funny how easy it was for him to beat Koga's doll with minimal effort. There's not much left.