The Stark Energy Rifle: To find this weapon go to the crash site of one the Stark Quinjets, but be careful a group of Stark Bots protect the crash site. (Image Credit: Epic Games)
Doctor Doom's Mystical Bomb: Head over to the Doom's Domain POI. At the north end of Pleasant Park inside of a ruined castle you will find Doctor Doom. Defeat him to get this massive damage weapon, but know his henchmen guard his lair. (Image Credit: Epic Games)
Doctor Doom's Arcane Gauntlets: Yes, that's right Doc. Doom has two OP weapons for you to take from him. Once you defeat him at the Doom's Domain POI you can get the gauntlets that give you a beam attack. (Image Credit: Epic Games)
Groot's Bramble Shield: A weapon and a means of transportation! You find this one randomly inside supply boxes located near the Quinjet crash sites guarded by Stark Industries Robots. (Image Credit: Epic Games)
Silver Surfer's Board: This legendary cosmic surf board lets you glide and rebound into and out of combat. Also similar to a Shockwave Grenade, you can find this one randomly inside supply boxes located near the Quinjets crash sites. (Image Credit: Epic Games))
Pump Shotgun: Well not really heroic, legendary or cosmic. This fan favorite gun is back in the game and a good alternative if you can't manage to find a super hero power to kill your way to victory. (Image Credit: Epic Games))
With the New Marvel Update in Season 4 Chapter 2 of Fortnite some new secret hero weapons can be found and used to overpower your enemies. Here's what has been discovered so far, and rumors have it even more hero weapons will be available at a later date in Season 4.