Invasion! (Arrow)

Synopsis
Oliver wakes up to a life where he never got on the Queen's Gambit. Robert and Moira are alive and well. Laurel is his loving fiancée and their wedding is imminent. Everything seems perfect, but Oliver starts to notice small imperfections that make him question this new reality. Meanwhile, Felicity and the recruits take on a new threat with help from The Flash and Supergirl.

Protagonists

 * Team Arrow
 * Oliver Queen
 * Green Arrow/Spartan (John Diggle)
 * Speedy (Thea Queen)
 * Felicity Smoak
 * Mister Terrific (Curtis Holt)
 * Wild Dog (Rene Ramirez)
 * Ragman (Rory Regan)
 * Dominator's Alternate Reality
 * Quentin Lance
 * Laurel Lance
 * Moira Queen
 * Robert Queen
 * Team Flash
 * The Flash (Barry Allen)
 * Cisco Ramon
 * Legends
 * Sara Lance
 * Ray Palmer
 * Nate Heywood
 * Gideon
 * Supergirl (Kara Zor-El)

Antagonists

 * Dominators
 * Dominator's Alternate Reality
 * Damien Darhk
 * Dark Archer (Malcolm Merlyn)
 * Deathstroke (Slade Wilson)
 * Cyberwoman (Laura Washington)

Other Characters

 * David Hackett
 * Firestorm (Jefferson Jackson)
 * Firestorm (Martin Stein)
 * Roy Harper
 * Tommy Merlyn

Teams and Organizations

 * S.T.A.R. Labs

Species

 * Cyborgs
 * Dominators
 * Humans
 * Kryptonians
 * Metahumans

Objects and Concepts

 * Speedy Suit
 * Devarim Rags
 * Dominator Technology
 * Dominator Mothership
 * Dominators' Alternate Reality
 * Deathstroke Suit
 * Dark Archer Suit
 * Malcolm Merlyn's Bow and Arrow
 * Firestorm Matrix
 * Firestorm Suit
 * Quantum Splicer
 * Green Arrow Suit
 * Heat Gun
 * Mister Terrific Suit
 * Oliver Queen's Bows and Arrows
 * Thea Queen's Bow and Arrow
 * Spartan Suit
 * Supergirl Suit
 * The Flash Suit
 * Van Horn Industries Technology
 * Waverider
 * Wild Dog Suit

Locations

 * Dominators' Alternate Reality
 * Star City
 * Bunker
 * Smoak Technologies
 * Star Metro Police Precinct
 * Queen Mansion
 * Earth-1
 * Earth
 * United States of America
 * Central City
 * S.T.A.R. Labs Central City Facility
 * NASA
 * Star City
 * Bunker
 * Van Horn Industries