Uses CGI stand-ins from JP1 and the D-rex CGI isn't finished, but the Mosasaur one is!

Photo of the Mosasaur: 

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UPDATE: Leaked clips have been removed. 

UPDATE 2: I've just been sent some pictures from a FOURTH leaked video! One with an overturned gyrosphere, and 2 others involving Pteranodons attacking a helicopter. Seems like we're getting the Ptero Attack from the scrapped finale of TLW!