Oliver is heading for a wedding in the full batch of photos from Arrow‘s 100th episode, airing Wednesday, Nov. 30 as part of the CW superhero series’ 4-way crossover event.

In the milestone hour, titled — like the Flash and Legends of Tomorrow episodes that bookend it — “Invasion!,” Oliver wakes up to a life where he never got on The Queen’s Gambit. As such, Robert and Moira Queen (guest stars Jamey Sheridan and Susanna Thompson) are alive and well, while Laurel (Katie Cassidy) is his loving fiancée and their wedding is imminent, with a doting Sara (guest star Caity Lotz) tending to her sis. Arrow Season 5 Photos

Indeed, everything seems perfect — though YMMV seeing Felicity back with Ray Palmer (guest star Brandon Routh)! — but Oliver starts to notice small imperfections that make him question this new reality (erhaps as the result of something the aliens known as the Dominators do in that Tuesday’s episode of The Flash?). Meanwhile, Felicity and the recruits take on a new threat with help from The Flash and Supergirl (guest stars Grant Gustin and Melissa Benoist).

Check out all of the fresh photos in the gallery above right.