Downloading the map pack ATM. Velociraptor Map Pack, is the full name, which includes 2 Co-Op maps, and 4 multiplayer maps. 2 of the multiplayer maps are brand new, and one contains Dilophosaurus, and possibly other dinos (On Wikipedia they say "Large dinosaurs", so I dunno. Definately not Trex, I assure you). The other two maps are re-designs popular current maps, but they take place at night, which adds to the gameplay (They say raptors are a larger threat at night then during the day).
The re-designed maps are "Inconclusive Tests", which is a re-design of "Testing Grounds", and "A Rivalry Continues", which is a re-design of "A Heated Rivalry".
The new maps are "Desolation" and "Sentinel".
Wikipedia Information On "Desolation":
A brand new swamp-based map where simple structures are set up alongside a rock cliff to allow helicopters and transports into the area to bring in supplies. There are many hiding spots on this multi-level map which enables numerous quiet kill opportunities.
Wikipedia Information On "A Rivalry Continues":
Another new multiplayer map and one of the largest Turok maps to date. The setting takes place at the top of a mountain around one of Kane's orbital defense arrays—the very base that shot down the Whiskey Company ship from orbit in the single-player campaign. Also, the presence of a few large dinosaurs on the map can make things very interesting during multiplayer combat.
So hopefully we see maybe a new dino? Or a few Lurkers? All I know is Dilophosaurus is included in one.