I believe its Khan. And its definitely not a line for line remake of either Space Seed or TWOK.
There's a few nods to TWOK though. The biggest will be the dramatic fight between the Enterprise and the Reliant as they play cat and mouse in and out of the ocean like the TWOK Mutara Nebula scene.
Pure speculation of course… but lets see if I'm right… and who dies saving the ship this time around… that's going to be one helluva unexpected twist?
TREK IS TREK. WHATEVER THE TIMELINE!
The next TV Series should be called STARFLEET!