Here's how Netflix is doing their Marvel shows right now: two a year. You get one in spring and one in the fall. They snuck a Daredevil season 2 in there, which maybe makes you think that they'll introduce two shows a year but also bring old shows back for new seasons, but that is not yet the case. Talking at the Television Critics Association press trail of tears, Ted Sarandos made it clear that the next two post-Luke Cage Marvel series are Iron Fist and The Defenders in 2017, and that anything else will have to wait. Maybe for a long time. That means no Jessica Jones season two until at least 2018.
The good news? Sarandos is no dummy, and he understands how hot these Marvel shows are. When IGN asked him if we could one day see up to five series a year he said, "I doubt that we could produce at the quality that they produce at that speed. But we’re gonna try to make them quicker so we can get less downtime between them." Which means it is probable we could get to three a year, which might mean The Punisher could hit in 2018 as opposed to 2019.
Speaking of The Punisher, will he be in The Defenders? When asked, Sarandos just said "Uh... stay tuned."