There was a novel by Steven Alten in the 90s about one which survived in the marianna trench (LOL) and it comes up to terrorise the US coast.
https://en.wikipedia.org/wiki/Meg:_A_No ... eep_Terror
In more detail, the protagonist Jonas Taylor gets a call from his older Japanese friend (who just happens to have a hot daughter, you can see which way this is going) to help retrieve a submersible in the marianna trench and then he sees the megalodon. Meanwhile Jonas's estranged wife gets killed by the Meg.

Looks like its being adapted with quite a few changes
For one thing, Japanese friend seems to be changed to Chinese ones and its China's turn to get terrorised by giant monsters (its clearly attacking around Hainan based on the landmarks). This is not surprising since Chinese companies appear to be partially funding this.
So basically giant prehistoric shark and Jason Statham. Hmm. I am in.
