Theworld'sgreatestsuperheroesaregatheredaroundforStanLee'ssurprisebirthdayparty.Alliswelluntilahandfullofvillainsworkingforanunknownsourcetrickstheheroesintobattlingeachothertothedeath."TheGreatestFanFilmofAllTime"isthesequeltothecriticallyacclaimed"Batman'sGonnaGetShotintheFace"andisanon-profitfanfilm.Itisalsothecreators'finalfanfilm.