Marvel will be unveiling a trailer for a "brand new show" on Saturday at Comic-Con International: San Diego, according to Chief Creative Officer Joe Quesada. The artist/executive promised the trailer at his annual "Cup O' Joe" panel taking place Saturday beginning at 3:00 p.m. PST.
"Fans that attended last year’s panel were treated to a never before seen (and hysterical) 8 minute outtake from Daredevil Season 1 and this year’s panel will be no different," said Quesada on his personal Tumblr. "If you’re a fan of our TV shows I’ll be premiering a trailer for a brand new show we’re working on. This will be the only time at the con that you’ll be able to see it so make sure to get there early."
There are several possibilities for this mystery trailer. Of all its "brand new" shows, Netflix's Luke Cage is the one closest to completion - and one that has yet to have an official trailer (the March 2016 video was earmarked as a "teaser"). Quesada has a personal tie to that show, as a illustration of his is being given out as a limited edition poster at this year's SDCC. The only thing going against this theory is that Luke Cage has its own panel scheduled for Thursday evening with the cast and crew.
Other possibilities include the currently filming Netflix series Iron Fist or FX's Legion. The latter might seem a stretch given it's an X-Men property, and by extension 20th Century Fox, but that property is one of several being co-produced actively with Marvel Television - in fact, it was originally announced on Marvel's own website.
Dark horse candidates for this could be one of Marvel Television's numerous animated series previously reported to be in the works, or even something as germaine as a documentary-style one-off like ABC's Captain America 75th Anniversary special.
Newsarama will be reporting on this, and all of SDCC, live throughout the weekend.