Oh, I know that JJ, Daredevil and Luke Cage all explicitly reference the Battle of New York, I just got the impression that the Netflix/Defenders series were retconned out of the MCU for a while then brought back in.They didn't need to retcon. In Jessica Jones Avengers 1 is clearly referenced. There are other ones as well.
I think they bring in JJ. There is also talk of a Punusher one off streaming movie last I heard.
I see Mike Coulter coming back. Finn Jones? Tough sell.
As I said, Finn has said he would like to do a Heroes for Hire series with Mike. There's also talk of giving The Defenders a second season. There was a fan theory that the reason why Kingpin was able to regain so much power in Hawkeye is because The Defenders were blipped. I haven't seen it yet but Echo shows that at least Matt Murdock was alive during the Blip years. I haven't seen Born Again yet but I'm interested to see if The Blip is addressed at all.