We already know three of them returned to their former positions but I wonder if those in KT will have a significant role in the plot. Somebody was about to get in touch with them the last time we saw them, was that person from Vandenreich too? I find it a tad strange that they live in KT though considering that they're spiritual beings and other vizards are in SS. I also wonder if Hiyori is ok with other vizards' decision to rejoin Gotei 13.
Hiyori felt a shinigami, not the Vander-what's-their-name. I hope Kubo gives us a good explanation of why the Vizards rejoined the Gotei 13 too.
I wonder if these vandenreich bad guys will take a special interest in them since they too seem like a hybrid type. It seems as if they are combining quincy powers with all kinds of others, so maybe we'll see a situation where some of the vizards like the ones that didn't go back to SS get captured, and the rest having to try and save them.
I can see them running into Ichigo's group in Hueco Mundo by some turn of events, and joining forces to fight against their new mutual enemy. From the looks of it, every group we've seen so far will be banding together in a front against the Vandenreich... With the exception of the Quincy of course.
Three of them get their captain positions back I don't know what happens to the rest of them. I think the rest of them stay in the human world. The three that get their captain positions back are Shinji, Love, and Kensei.