Most the characters were inspired from various places. In case you're curious, here's some of them. These were solely jumping-points. The actual end results differed wildly.
Jackson Hazard: Virgil 'Bud' Brigman - The Abyss
Cotton Parr: Dr. Sweet - Atlantis: the Lost Empire
Nova: Liz Sherman - Hellboy
Harlan Lincoln: Wedge Antilles - The Star Wars Trilogy
Jordan McCree: Norrington - Pirates of the Caribbean
Eli Carter: Carter Burke - Aliens
Sullivan Gull: Wash - Firefly