The Chapter 2: Season 4 Week 7 Challenges were a a set of challenges that were released on October 8th, 2020. The challenges were available for completion until the season ended.
Upon completing 10 challenges from Week 7 and Week 8, the God Emperor Style for Doctor Doom was unlocked.

Challenge Rewards
Search Chests at Catty Corner (7)
25,000 XP - Icon - Fortnite.png
Eliminations at Craggy Cliffs (3)
25,000 XP - Icon - Fortnite.png
Enter the Vault of Doom in Doom's Domain (1)
25,000 XP - Icon - Fortnite.png
Destroy Cobwebs at The Ruins/The Authority (3)
25,000 XP - Icon - Fortnite.png
Discover Tony Stark's hidden Lake House laboratory (1)
25,000 XP - Icon - Fortnite.png
Drive a car from Sweaty Sands to Misty Meadows in less than 4 minutes without getting out (1)
25,000 XP - Icon - Fortnite.png
Deal damage after knocking an opponent back with Storm's Whirlwind Blast [Rec: 4 Players] (1,000)
50,000 XP - Icon - Fortnite.png

Chapter 2 Missions and Challenges
Chapter 2: Season 1 New World - Open Water - Forged In Slurp - Dockyard Deal - The Lowdown - Hunter And The Hunted - Trick Shot - Dive! - Chaos Rising - Alter Ego - Remedy Vs Toxin - Rippley Vs Sludge - 8-Ball Vs Scratch - Cameo Vs Chic - Sorana - Winterfest
Chapter 2: Season 2 Maya’s Challenges - Brutus' Briefing - TNTina's Trial - Meowscles' Mischief - Skye's Adventure - Midas’ Mission - Deadpool's Weekly Challenges
Chapter 2: Season 3 Week 1 - Week 2 - Week 3 - Week 4 - Week 5 - Week 6 - Week 7 - Week 8 - Week 9 - Week 10
Chapter 2: Season 4 Week 1 - Week 2 - Week 3 - Week 4 - Week 5 - Week 6 - Week 7 - Week 8 - Week 9 - Week 10

XP Xtravaganza Week 1 - XP Xtravaganza Week 2 - XP Xtravaganza Week 3 - XP Xtravaganza Week 4

Chapter 2: Season 4 Awakening Wolverine's Challenges - Mjolnir's Awakening - Thor's Awakening - Jennifer Walter's Awakening - Sapling Groot's Awakening - Groot's Awakening - Storm's Awakening - Doctor Doom's Awakening - Mystique's Awakening - Tony Stark's Awakening
Chapter 2: Season 5 Legendary Quests - Epic Quests - Rare Quests

Beskar Quests - Jungle Hunter - Operation: Snowdown - The Spy Within - Wakanda Forever Quests

Chapter 2: Season 6 Legendary Quests - Epic Quests - Rare Quests

Agent Jones Quests - Spire Quests

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