^ What, Excalibur?
http://en.wikipedia.org/wiki/Excalibur_(comics)
In looking over the top villains for Excalibur, the best options IMO are:
Arcade
Although he has no superhuman powers, Arcade has a genius level I.Q. and a natural aptitude for mechanics, architecture and applied technology. A brilliant and self-taught designer, Arcade applies his talents to the construction of mobile amusement park-like deathtraps, which he calls "Murderworlds".
Black Tom Cassidy
Cousin of Banshee, he's an
Irish born mutant with the ability to fire energy beams from a wooden surface. He often uses shillelaghs as his weapon of choice and seems to have florakinesis.
In the comics he was often paired with the Juggernaught (too bad this character was ruined in Last Stand!). Is there any way to fix that to make Juggernaught usable in this new reality?
Ahab
Dr. Rory Campbell was a psychologist who worked with Exaclibur. He discovered the existence of an alternate reality in which he became the mutant hunting Ahab, creating and leading hordes of mutant trackers called "Hounds." Campbell became determined to prevent that future from ever happening.
Excalibur had captured a villain names Spoor (an Acolyte of Magneto) and Campbell built a special room to perform therapy on him. The room had built-in lasers to react to any hostile behavior and Campbell used tranquilizers while talking to Spoor so as to inhibit his mutant power. Spoor eventually used his powers to provoke Campbell into attacking him. As a result, the room's weapons fired at the scientist, costing him a leg. Campbell saw that his destiny of becoming Ahab was coming true, indicating that possibly it was this reality's future where Apocalypse took over.
Ahab has also been one of Apocalypse's Horsemen (Famine) in the comics.
Jamie Braddock
Oldest brother of Brian Braddock (and Betsy), he grew up to be successful, but then got caught up in some major gambling debts. He was turned insane by Doctor Crocodile.
Jamie sees the world as invisible string constructs, which he can pull to transform reality. He can only manipulate dense forms (phased beings have some level of resistance); formerly he needed to be close enough to touch the "cosmic filaments" things were composed of, but his range may have grown, based on recent events in his siblings' lives.
Spoor
Spoor is a mutant with the ability to secrete pheromones, allowing him to control others and used these powers to have people kill each other. Excalibur ally Dr. Rory Campbell tried to cure Spoor, but during the treatment Rory's hatred of mutants allowed Spoor to affect Rory to attack him. The aggression-tracking automatic security systems in Spoor's cell, known as the Pen, activated and a laser beam severed one of Campbell's legs.
I could see one movie/or tv series season focus on Spoor as a lesser villain, with Ahab as a main (or set up for future).
I could also see Merlyn as a character, even used as somewhat of a villain...
