Cable channel Freeform ordered Cloak & Dagger, a youth-oriented superhero series starring Olivia Holt and Aubrey Joseph, from Marvel Television in April 2016 following years of development.

Despite initially stating that the two series would be kept separate, Marvel Television announced a crossover between the two in August 2019 with Holt and Joseph appearing in the third season of Runaways.

This allowed showrunners Josh Schwartz and Stephanie Savage to deal with concepts such as superheroics and fantasy without explaining them to the audience, since they are already well established in the MCU, while still focusing on their own characters, which they described as "liberating".

[8] New Warriors was no longer set to air on Freeform in November 2017, after the network did not have room in its schedule for the series and gave the project back to Marvel.

[13][14] In August 2019, Marvel and Hulu announced that Cloak and Dagger would be appearing in an episode of Runaways' third season, with Loeb describing this as "the adventure everyone has been waiting for and we've only hinted at.

[4] In February 2017, Marvel announced the Runaways actors, with Rhenzy Feliz as Alex Wilder, Lyrica Okano as Nico Minoru, Virginia Gardner as Karolina Dean, Ariela Barer as Gert Yorkes, Gregg Sulkin as Chase Stein, and Allegra Acosta as Molly Hernandez.

[21] Shortly after, they announced the Pride—the parents of the Runaways—actors, with Ryan Sands as Geoffrey Wilder, Angel Parker as Catherine Wilder, Brittany Ishibashi as Tina Minoru, James Yaegashi as Robert Minoru, Kevin Weisman as Dale Yorkes, Brigid Brannagh as Stacey Yorkes, Annie Wersching as Leslie Dean, Kip Pardue as Frank Dean, James Marsters as Victor Stein, and Ever Carradine as Janet Stein.

[25] A different version of Tina Minoru previously appeared in Doctor Strange, in a minor role as a Master of the Mystic Arts portrayed by Linda Louise Duan.

[32][33] The third season, released on December 13, 2019,[34] sees Olivia Holt and Aubrey Joseph reprise their roles as Tandy Bowen / Dagger and Tyrone Johnson / Cloak from the series Cloak & Dagger for a crossover episode,[14] and sees the Dark Dimension featured, along with the Darkhold as it was portrayed on Agents of S.H.I.E.L.D..[35] In New Orleans, Tandy Bowen and Tyrone Johnson, two teenagers from different backgrounds, acquire superpowers after a life-changing event that revolved around the collapse of an oil platform.

[36] Tandy and Tyrone later work to solve the abductions of women run by Andre Deschaine while dealing with Detective Brigid O'Reilly's vigilante half Mayhem.

Doreen Green / Squirrel Girl, Craig Hollis / Mister Immortal, Dwayne Taylor / Night Thrasher, Robbie Baldwin / Speedball, Zach Smith / Microbe, and Deborah Fields / Debrii,[7] are superpowered young people with abilities very different from the Avengers, who want to make a positive impact in the world even if they are not quite ready to be heroes.

[67] By the end of August 2016, Marvel Television and ABC Studios were developing a half-hour comedy series based on the New Warriors team and featuring Squirrel Girl.

[6] In April 2017, Freeform announced a straight-to-series order for Marvel's New Warriors, with Kevin Biegel serving as the series' showrunner and writing the first script.

[67][68] In July 2017, the cast was revealed with Milana Vayntrub starring as Doreen Green / Squirrel Girl and Derek Theler as Craig Hollis / Mister Immortal.