[SPOILERS for Agents of S.H.I.E.L.D. season two ahead.]
Marvel/ABC's Agents of S.H.I.E.L.D. TV show dealt with the collapse of "old S.H.I.E.L.D." during its freshman season, before (naturally) its focus with season two shifted to the brave new world that emerged thereafter - complete with the discovery of a long-kept secret Inhuman civilization on Earth. Season three will continue from there, by introducing the "Secret Warriors": a team of super-powered individuals dedicated to keeping the world safe, with Skye (Chloe Bennet) leading the charge.
It's now official that Skye is really Daisy Johnson a.k.a. Quake from the Marvel comic book universe, though the character spent much of S.H.I.E.L.D. season two just learning about her true heritage (and dealing with the emotional/psychological ramifications of that information). Bennet has already begun teasing Skye's proper transformation into Daisy/Quake for season three, complete with a new haircut inspired by the character's comic book iteration.
Bennet has posted a video to her Instagram account, showing her about to get her long hair trimmed ahead of production on Agents of S.H.I.E.L.D. season three getting underway. She thereafter posted a message to her Twitter account to assure her concerned fans that her hairdo will be "a TV variation" of Daisy Johnson's comic book appearance (read: not quite as short).
You can watch Bennet's Instagram video, below:
BWW interviewed Bennet at San Diego Comic-Con 2015, where the S.H.I.E.L.D. star confirmed that Skye will have properly embraced her identity as Daisy/Quake in season three:
"I can confirm that this season I will referred to Daisy in all things, my trailer says Daisy, my script says Daisy. You will definitely see an evolution there. Right now, we are recruiting Inhumans, and there has been news about the Secret Warriors. So people are pretty excited about it."
Bennet also emphasized that while Skye/Daisy will continue to look forward and evolve as an agent (warrior?) in S.H.I.E.L.D. season three, the character will almost certainly still be dealing with what happened before with her now-deceased mother, Jiaying (Dichen Lachman), and her father Cal (Kyle McLachlan) - whose memory was wiped, during the show's season two finale:
"I thought the first season was traumatic, and then obviously the second season everything she's talked about since we've met Skye; her whole goal in life was to meet her parents. Then she met them and it was worse and even more screwed up then she can even imagine. Having your Mom try to kill you probably doesn't sit well in your psyche. I think she needs some serious therapy sessions. We don't know anything about Season 3, but I'd like to think that she's extra determined. Right now she's done, she knows everything about herself, she knows where she came from, she knows her family, and so now it's going to be about - being truly embracing that."
General opinion appears to be that Marvel's ABC TV series (Agents of S.H.I.E.L.D. and Agent Carter) have become increasingly successful at not just expanding the mythology of the Marvel Cinematic Universe, but also providing compelling stand-alone stories centered around non-Avengers. It remains to be seen how much, if any, of the Inhumans world-building that S.H.I.E.L.D. season three does (with Skye/Daisy and her Secret Warriors) ends up being directly acknowledged in the Inhumans movie that Marvel Studios has scheduled to reach theaters in 2019. Nevertheless, the show continuously improved throughout its second season and that upward trajectory doesn't look to change in the episodes that lie ahead.
Agents of S.H.I.E.L.D. season three begins airing on ABC on September 29th, 2015. Agent Carter season two will air during the mid-season break in early 2016.