It's only a matter of time that A to Z will be pulled surely.
IMO, CW and ABC will make the first renewals..
ABC renewing The Middle, The Goldbergs, Modern Family, Once and Black-ish are set in stone.
CW renewing Arrow, The Vampire Diaries, Supernatural (I am sure it will be the last year next year, I can't see them wanting to do another 2+ years as popular as it is still) and The Flash, with likely renewals from The Originals. Jane will be on the bubble until we see how it performs in the next few weeks, Reign is the biggest question mark.