User blog comment:B214/Talk About What You Want! 2/@comment-24098614-20140723012117/@comment-3325617-20140724002035

Vali did mention of having a rating game betwen him and Issei betwen Issei's peerage and his FOLLOWERS but he did say that he needs to fight Rias's Gremory peerage first.

As for Vali's team members joining Issei,I hardly believe that cuz :Kuroka already has pieces,Le Fay is Issei's magician partner (no serious stuff) ,Arthur.......... yeah he will follow Vali for the rest of his life(maybe),and I don't frickin see Bikou joining Issei,as for Fenrir he is loyal to his leader and to Le Fay especialy and I don't see any point of him(it) joining Issei.