Source: dccomics.com

2. Swamp-Thing

WARNING: The Top 2 are gonna be thuddingly obvious choices. Sorry about that.

The Swamp-Thing is a perfect choice for a movie like this. A wise and inhuman creature, the thing that was once Alec Holland (or wasn't, depending on which version they pick) is a great addition to an expansive team of heroes. Especially if he's the being who assembles the team.

Heck, if anybody's gonna notice a magical crisis in the making, it'd be the guy tied in with all of the natural world, right? Can you imagine him reaching out to all corners of the world to bring together the greatest magic users and mysterious horrors of the world like some sort of all-knowing, leafy Nick Fury?

Plus, if we're throwing Black Orchid on the team, Swamp-Thing would be the perfect mentor for her. I don't know if I'd put him on the field team, since he might actually be too powerful, but operating as the JLD's version of Zordon from Power Rangers? I could get behind that.