Cosplay AFTER death? Yes.
Puerto Rican man Renato Garcia was all with respiratory problems, and then he found a Green Lantern costume in a box of clothing. He spent his last few weeks wearing it around his hometown. When he passed away, at age 50, his sister decided to dress him in the costume for his wake.
As lugubrious as this story sounds, dressing people in unusual way from life is a Puerto Rican tradition, so it has cultural validation. And you know, a lot of people are inspired by Green Lantern.
Photo by Ricardo Arduengo for the AP