A Tomb Raider (2013) AU.
When Kara Danvers convinces the Crew of the S.S. Endurance to travel into the Devil's Triangle to find the lost island of Yamatai. She ends up fighting for the chance to tell her best friend she loves her, fighting to be even slightly as badass as her sister, and to keep Winn from succumbing to his own misguided heroic tendencies.
Also featuring: Mon-El as the egotistical documentary maker. J'onn J'onzz as the ever elusive expedition captain, and Sam Arias as the documentary producer who somehow has Alex Danvers in a tizz.