I don't like to instigate ugly rumours, but are Avatar going through a difficult patch at the moment? Their July 2017 solicits include just one single new comic release (Uber Invasion #7), a couple of reprint books based around Providence and a Garth Ennis War Stories compilation - and now I've seen that they're having a big 50%-off sale for loads of their hardcopy TPBs and HCs, which is quite unlike them:
I know they've coasted for a while on their connections with the likes of Moore, Ellis, Ennis and Gillen, but even then the publisher's output seems to be really tailing off. Ellis seems to be doing all his new stuff at Image, there isn't a new issue of Cinema Purgatorio solicited past #11 in June (it seems to have gone bi-monthly now, so maybe one will show up for August?), and they don't seem to have much of anything else in the works that I know of.