Fortnite Chapter 5 Season 4 is set to receive a significant update on September 17, introducing a new Iron Man skin based on his Mark 45 suit from 'Avengers: Age of Ultron'. This update, labeled v31.20, will also feature a new Marvel-themed limited-time mode (LTM) where players can utilize mythic powers from previous seasons. The Iron Man bundle will include the skin, a Pickaxe, Back Bling, and additional items, priced at 1,500 V-Bucks for the skin alone and 2,500 V-Bucks for the full bundle. Alongside the Iron Man content, players can expect changes to the loot pool, including increased spawn rates for certain items and the return of classic Stark tech. This update signals Epic Games' continued commitment to expanding the Marvel collaboration within Fortnite, enhancing the gameplay experience for fans. Overall, the upcoming patch promises to be one of the most comprehensive updates of the season.