Warning: this Erik Gelden explainer contains spoilers for Jessica Jones Season 3.
The cancellation of Jessica Jones means the end of Netflix’s Marvel Universe. Fortunately, the series was able to add a couple more Marvel Comics characters to this shared universe before the end. Not only did Foolkiller serve as the season’s main villain, Jessica’s new partner/love interest Erik Gelden is based (albeit very loosely) on the villain Mind-Wave.
Source: IGN.com Jessica Jones's Erik Gelden Has A Weird Marvel History