New York Comic Con tweeted an update on Jon Bernthal's appearance schedule, which has been reduced due to "his Netflix production schedule." Various sites have speculated that the filming for The Punisher series has already began, but the show hasn't started filming yet, and it's not expected to start until 2017.
The only Marvel Netflix show currently in production is Iron Fist, which could mean that The Punisher might appear in that series. The Punisher's addition in Iron Fist would definitely raise up the excitement for the series, and his role might play a significant part in gathering the members of The Defenders before the crossover show begins next year.
So would you like to see Jon Berthal's The Punisher in Iron Fist?