Creating the ultimate adventure series: The Oceanus Project

Hello fellow book lovers! Are you a fan of Indiana Jones or the various books by Dan Brown? The Oceanus Project is an idea that's been floating around in my head for two years. I've played around with the idea of a treasure hunting series set around Jonas Stone, an unknown but brilliant underwater archaeologist and historian who is recruited to find a lost shipwreck. In it, he and his son discover an object so mind boggling that an entire crew is taken hostage and killed. It's an underwater thriller with loads of potential.
Do I have your interest? My only problem is I don't know what angle I want. Should I go with a supernatural theme like The Abyss and Raiders of the Lost Ark? Or keep it earth-based and stick to the science? I look at Jurassic Park, a novel and movie I loved. The science—hokey as it was—sparked debate about what could we do with technology, and what should we do if given the opportunity.
Your thoughts?