User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-26285797-20150506120633/@comment-24502975-20150506141307

My speculation on v20 is title/short summary/release date in ~15 days, quotes in June (aren't they a month before the vol's release, Jop?) and v20 in July.

As for Vali, a bloodline power-up seems pretty accurate. It'd give us a chance to learn a bit more about the Lucifers too.