What If Nightwing lead the Arrowverse?

I've previously made a structuring of the way Arrow would've worked if the CW made a Batman TV show instead of a Green Arrow show due to the influence of Batman that was spread into the roots of the show. However, that doesn't extend to how the rest of the Arrowverse would work, so today I'm replacing Arrow with a Nightwing series that would create a television universe in the same way Arrow did (though to a lesser extent)

Nightwing
Airing: 2012-20

Seasons: 8

Plot:

Protagonists:


 * Brenton Thwaites as Nick Grayson/Nightwing
 * Emily Bett Rickards as Barbara Gordon/Oracle
 * David Ramsey as John Diggle
 * Caity Lotz as Helena Bertinelli/Huntress
 * Anna Diop as Raya Vestri
 * Katie Cassidy as Elise Svoboda
 * Jensen Ackles as Bruce Wayne/Batman
 * Curran Walters as Jason Todd/Red Hood

Antagonists:


 * Manu Bennett as Slade Wilson/Deathstroke (S2)
 * The Court of Owls (S3)
 * Neal McDonogh as Damien Darhk (S4)
 * Josh Segarra as Prometheus (S5)
 * Kirk Acevedo as Ricardo Diaz/The Dragon (S6)
 * Alexander Siddig as Ra's al Ghul & The League of Assassins (S7)

The New Teen Titans
Airing: 2014-23

Seasons: 9

Plot:

Protagonists:


 * Tim Drake/Robin
 * Koriand'r/Starfire
 * Rachel Roth/Raven
 * Gar Logan/Beast Boy

Antagonists:


 * Slade Wilson/Deathstroke
 * Brother Sebastian Blood
 * Trigon

Batwoman
Airing: 2015-21

Seasons: 6

Plot:

Protagonists:


 * Ruby Rose as Kate Wayne/Batwoman
 * Meagan Tandy as Sophie Moore
 * Camrus Johnson as Luke Fox/Gotham Knight
 * Nicole Kang as Mary Hamilton
 * Elizabeth Anweis as Selina Kyle

Antagonists:


 * Rachel Skarsten as Elizabeth Kyle/Alice
 * Peter Outerbridge as Roman Sionis/Black Mask
 * Nick Creegan as Marquis Jet/Joker II

Red Hood & The Outlaws
Airing: 2017-

Seasons:

Plot:

Protagonists:

Antagonists:
 * Jason Todd/Red Hood
 * Rose Wilson/Ravager
 * Connor Kent/Superboy

Birds of Prey
Airing: 2018-

Seasons:

Plot:

Protagonists:

Antagonists:
 * Stephanie Brown/Batgirl
 * Katheryn Winnick as Dinah Lance/Black Canary
 * Caity Lotz as Helena Bertinelli/Huntress
 * Holly Hall/Hawk
 * Dawn Hall/Dove
 * Cassandra Wu-San/Orphan

Harley & The Sirens
Airing: 2020-

Seasons:

Plot:

Protagonists:


 * Dr. Harleen Quinzel/Harley Quinn
 * Dr. Pamela Isley/Poison Ivy
 * Selina Kyle/Catwoman

Antagonists:

Batman Inc.
Airing: 2021-

Seasons:

Plot:

Protagonists: Jensen Ackles as Bruce Wayne/Batman

Antagonists: