Volume 7 will go to print when page-count is reached, so "first submitted, first published" and later submissions will go to "Volume 8".
For all details on how to participate, how Requiem Publications works, what they expect of fic writers, and what they offer fic writers, email them at: ReqPub@gmail.com.
(Requiem Publications is the combined effort of two longtime fen with decades of zine publication experience. They have received numerous awards for their zine publishing, their writing, and their artwork. I can also give a personal rec because of my own experience being zined by them.)