Guilty Gear seriously killed this game though.
With most fighting games going full 3D like Street Fighter and King of Fighters, there was a lack of 2D fighting games for some time.
Skullgirls filled that void temporarily, but it's character roster was far from being interesting and unique.
Guilty Gear and other fighting games developed by ArcSys just completely filled that void and killed any competition.
Before people say that Guilty Gear is fake 2D, whatever, it looks as good as if it actually was.
Plus, Arcsys character design is miles ahead of whoever is designing Skullgirls characters.
The fact you're using the art style to differentiate fighting games doesn't fill me with confidence that you know what you're talking about. Within the "2d fighter" (which is to say fighting games with no third axis, as compared to "3d fighters" like Tekken, DoA, and Soul Calibur) there are two main genres, conventional fighters, and hyper fighters. Stuff like Street Fighter and Mortal Kombat are conventional fighters which tend to be more grounded and focused on the neutral game, while hyper fighters are categorized by their massive combo counts and advanced mobility options.
Skullgirls is based on Marvel vs Capcom 2, which is considered to be one of the progenitors of the hyper fighter genre. Guilty Gear Strive is much closer to a conventional fighter, although it does borrow some qualities from the hyper fighter subgenre, "anime fighters", like the Burst gage and air dashes. So while there is some overlap, they cater to different niches within the fighting game community. Strive didnt kill Skullgirls, because Skullgirls was never its direct competitor. If you told me Strive killed KoF XV I'd say you're probably right, and if you told me Thems Fighting Herds killed Skullgirls I'd at least understand your argument. Saying Strive killed Skullgirls is patently ridiculous though
Don't care about Skull girls but I loved Indivisible, I hope we will see a sequel.
Sorry man, Lab Zero imploded and 505 owns the rights to Indivisible now. It looks like they're content to let Indivisible die as a franchise. The only reason we're seeing movement on Skullgirls again is Autumn put out a mobile fighter with gacha elements that made them bank. They ran out of characters to add so they commissioned more, and Annie caused their mobile revenue to go gangbusters.