The base figure is Captain Britain from the Captain America First Avenger. I just wanted to add that I love using this figure for customizing. I have done a Batman and have a couple in my figure morgue for future projects. I trimmed the chin guard and added Epoxy Sculpt for the fin. The cape is from the old crusader from the Indiana Jones line. I airbrushed most of the figure and detailed with a brush.
The figures contained in the Custom Showcase are not for sale by Figure Realm, and the creators of the customs are no way affiliated with Figure Realm. The Custom Showcase is purely for entertainment purposes and only provides a means for the creators to show off their work and trade ideas. Figure Realm does not make or sell customs.