According to multiple reports, press screeners have already been released for the upcoming season of Daredevil. Television embargoes typically lift fairly close to the release date (more typical for television than for films). Grace Randolph also revealed that the embargo lifts in "mid-October", which likely means the show launches either around that time or, at latest, early November.
Additionally, it appears as though fans of ABC's Agents of S.H.I.E.L.D will have to wait quite a while for that show to return. While it was previously reported as being moved to the summer (with ABC President Dungey saying that it would be a good fit for the show to counteract its declining live ratings, which matter less for summer programs), we now have a more specific timeframe thanks to one of the shows stars. Show star Elizabeth Henstridge left a replied to a comment on one of her Instagram posts, saying the new season would be coming
July 2019. While filming for the show is already underway, it is still unclear if Clark Gregg will be returning after his venture in Captain Marvel next March, though he is at least directing the season 6 premiere.