It would give you a lot more freedom to do exactly what you need, but it would be an incomparable amount of work vs just doing a custom character.
With a skin or custom playable character we don’t have to worry about creating a world with NPC’s and items and writing for NPC’s and levels and bosses etc. etc.
It would be such a sick thing if it happen but it would definitely be outside of my ability to even attempt at this point
With a custom character I could at least see myself helping with writing and VA and some of the design, but you’d need a whole-ass team to make a fan game, I think.
That’s not even bringing in the idea of a budget :/ although a full fan game would be incredible.
Maybe after creating the character it could serve as inspiration for someone to put together a team to make a game? But who knows