Just based on how these things typically go: any minute now, the submersible’s rescuers will meet the Cthulhu-esque creature that captured it, prompting an outcast scientist to join forces with an ex-navy action guy to defeat the monster and rescue the craft (which is carrying the action guy’s strong-willed daughter who became its operator against her father’s wishes, and the outcast scientist’s ex-wife, who was researching mysterious new biological activity detected near the Titanic wreck)