Johnny's net has updated with dates for what will be the first solo concert for Junior group A.B.C-Z. They've headlined for concerts before with other Juniors and had a concert with Kis-My-Ft2 back in 2008 at Yoyogi Arena where this solo concert will take place. The concert will be on November 6th and there will be two concerts for that day planned.
I'm just going to take a moment and speculate that this is when and where we find out more about what's going on with the whole A.B.C-xyZ thing. By that date Kawai should have recovered from his injury and if Johnny Kitagawa is to believed that's when he wants to move forward with this idea. I think we'll probably at least find out for sure who the new members of the group will be at this concert if we don't get that news at the Kis-My-Ft2 with Juniors special concerts next week, though I would think they may want to use those to announce something for Kisumai instead and just let the Juniors there get some special promotion to help build their fan bases.
In any case I think this concert more or less shows that there is some truth to A.B.C-Z, or the proposed A.B.C-xyZ new version of the group, are being considered for debut. They're still a long way from being at the point Kisumai was before their debut, when it made little sense not to debut them or at least some of the members, but this is the start for Junior groups to build up to that.
It's times like these I really wish I was back in Japan so I can be at these concerts to learn first hand what's going on, as it's definitely interesting times with Johnny's.