I don't see that many people calling for a Misty Knight spin-off.
I like Misty Knight as a character, but I think we have other characters that should take priority for a series over her or Daughters of the Dragon.
Elektra definitely has potential for a series at some point down the line, but how many shows can we realistically have on Netflix either?
Case in point, all these new shows are causing delays for second seasons. So they are going to have to up the show production at some point to accommodate them.
That's why aside from Moon Knight, future Marvel Netflix series need to take place in places other than NYC so we Marvel don't have overlap with actors or production schedules + they can shoot cheaper since shooting in NYC is expensive. When you look at what properties Marvel still have to develop for TV which would be a good fit for Netflix, it breaks down nicely like this.
Ghost Rider = LA and Las Vegas
Blade = NOLA
Elektra = DC for the first season (and surrounding woods in Maryland subbing for South America), Tokyo in future seasons.
Shang Chi = Hong Kong
Moon Knight = NYC
So only one more series set in New York. The rest all have a unique location which means a possibility for more shows and each show has something to offer. Moreover, aside from Moon Knight, they all work as standalone TV series without getting too involved in the continuity of the greater MCU. Blade and Ghost Rider would eventually get a team-up miniseries but each would have their own supporting cast. Blade gets Rachel Van Helsing, Whisler, Hannibal King, Frank Drake, etc. Ghost Rider gets not only up to four Ghost Riders but also Jennifer Kale, Damien Hellstorm, Satana and Roxanne Simpson. I'd make Ghost Rider 6-8 episodes to give a larger budget to each episode. The rest all work well with a TV budget. And it won't hurt the release schedule at all. It just means more series per year. We know that in 2017, we're getting three series and in 2018, we're getting JJ, DD and Cage. Bumping things up from three to five a year isn't going to affect things THAT much. If anything it makes Defenders easier since other series can film while Defenders does. Rosario Dawson has been holding up production for most of the Netflix series. Once you no longer need one character to appear in every series, it gets easier to film multiple at once.
And Shang Chi would have something special to offer if it were A. Marvel's first Asian lead in a solo series and B. It would be in Chinese with English subtitles, set in Hong Kong as a martial arts crime drama where a SHIELD agent is forced to fight his own family. It's that family drama inherent in fighting the Si Fan that makes Shang Chi stand out. He's a SHIELD cadet taking on the most powerful triad in Hong Kong who have wealth beyond his imagination and he's given up the that chance to have that power to stand for justice even if it makes him a pariah among everyone he once knew. Add in Mockingbird as a secret ally helping him and Taskmaster as his greatest enemy who'd follow him for multiple seasons and you have a series that really comes across as nothing like anything else Marvel have done. And get Hong Kong action directors to film each episode. Make the action one-up what's been seen in Daredevil and Iron Fist since Shang Chi has no powers. It's a great way for Marvel to market themselves to Asian audiences after the negative reactions to Daredevil and Iron Fist. It allows Netflix to have a product targeted at the Chinese market where they'd have a series that would allow them to break into the country. Most importantly, since Marvel care so much about the Chinese market, this is Marvel's best way to make money from streaming since it will sell subscriptions in the world's most populous country. That's why Shang Chi would work.
And as for She-Hulk on ABC, I'd cast a fitness model who can act, preferably somebody who also does MMA for the role of Jen. Cast as many women as possible and see which one has the best comic timing. Just say, "casting fitness models and female athletes. Must have exceptional comic timing" and send that as an open casting call and see who bites. I don't care about height. People got upset that Hugh Jackman was too tall to play Wolverine. People shut up about it after watching him. Make Jen have a six-pack inhuman form and just have green skin while transformed and make her any height. As long as she can flex, I'm good. The real challenge is making muscle show through body paint. Also, Jen has a small rogues gallery and one of her biggest foes (Behemoth) is too expensive for TV. I'd just use Titania as a villain and make She-Hulk's struggles juggling her career with super strength be the cause of most conflict.
And yes, source material does make a difference. White Tiger has no memorable villains. That means poaching somebody else's rogues gallery and hurting potential stories for other properties. There are other better options. Peurto Rican culture is a plus but I'm pretty certain that two out of four Ghost Riders are Mexican (which isn't the same culture but close enough) and America Chavez is Peurto Rican and I'd bet you money that she'll appear on New Warriors as a member of the main cast. White Tiger has never been able to sustain a series. No matter which White Tiger, there has never been one that has had a strong list of antagonists or a long-running series. It won't work. Audiences have already spoken and said that White Tiger isn't a popular character and they don't want more. Jessica Jones can still work without a strong rogues gallery since her series can be turned into a Daughters of the Dragon series in all but name and feature Misty and Colleen. We already have confirmation that Jessica will get less screen time and supporting characters will get more. My guess is that we're getting three protagonists in Season 2.
Elektra also deserves her own series since Marvel don't have that many options for female characters who can support their own series. Elektra is one of the few. She's popular and can sustain a series. And while Elodie Yung is cast, it's a good idea to start production after Defenders before she moves on to other things.
I'd honestly film things like this.
2018
JJ Season 2
DD Season 3
LC Season 2
Elektra Season 1
2019
IF Season 2
Punisher Season 2
Moon Knight Season 1
Ghost Rider Season 1
2020
JJ Season 3
DD Season 4
LC Season 3
Elektra Season 2
Blade Season 1
2021
IF Season 3
Punisher Season 3
Moon Knight Season 2
Ghost Rider Season 2
Shang Chi Season 1
Defenders Season 2
Throw Midnight Sons into 2022 as a miniseries and go up to six a year. That's plenty and things should plateau there since that's enough for Netflix which is a streaming service and can handle more Marvel programming than a normal network.