Here's a Fan Artwork of Darkwing Duck's Negaduck that I'd made back in 2019.
When I'd first saw the Darkwing episode of the New Ducktales where Jim Cummings returns as the original voice as Darkwing Duck but as the Actor Jim Starling who portrayed Launchpad's favorite hero until they findout that there was going to be a Darkwing Duck Movie at Scrooge Mcduck’s Movie Studio and (Yes guys Scrooge Mcduck had his very own Movie Studio mostly to make films for business) so when Jim Starling shows up to ask for the part he gets turned down due to being replaced by Drake Mallard who in the New Ducktale universe is an Actor and along time fan of Darkwing Duck and becomes friends with Launchpad later on Jim Starling tries to take over the Movie and tries to kill everyone by setting the stage on fire after feeling the pain of being rejected until Drake shows up to save everyone and confronts Jim that he plays a hero until the stage falls on Jim and has cause everyone to believe that he had fallen to his death but survives losing more of his sanity while his outfit changes to the colors becoming Negaduck.

In this Picture I used a scene reference from Jack Nicholson's Joker from the 1989 Batman Movie where he finds out that everyone believe that he's dead and as Jack Nicholson's Joker once said: (Jack is dead my friend but can call me Joker) and as for Negaduck it takes one bad day.

Ducktales & Darkwing Duck Belong to Disney.