Reddit user, Marcodelau, has posted a Transformers 4 call sheet that is filled with lots of goodies. Let's start with the Transformers that are confirmed based on this sheet: New Optimus, Bumblebee, Hound, Lambo, Pagani, Crosshairs, Drift, and Cyclonus. Fans did assume that Drift was in the mix, but Crosshairs and Cyclonus are surprising additions. Crosshairs is known as the Autobot weapons supervisor, and Cyclonus is Decepticon. He was created by Unicron, and is a genuinely loyal and competent second-in-command to Galvatron.
As for the human characters: Mark Wahlberg is Cade, Stanley Tucci is Joshua, Kelsey Grammer is Attinger, Nicola Peltz is Tessa, Jack Reynor is Shane, Sophia Myles is Darcy, Li Bingbing is Su Yueming, TJ Miller is Lucas, James Bachman is Gill Wembley and Titus Welliver is Savoy.
Most importantly, the call sheet confirms the Dinobots. These scene are actually part of the "1st Dinobot Attack," as titled by the sheet. No names or descriptions of the Dinobots are given. Their group is traditionally made up of Grimlock (T-Rex), Slag (Triceratops), Sludge (Apatosaurus), Snarl (Stegosaurus) and Swoop (Pteranodon). On the 80's animated series, they were created by Wheeljack, to add some muscle to the Autobots. Their lack of intelligence, and their incredible strength make a dangerous mix. Initially Optimus wants them shutdown, but a Decepticon attack, allows them to show off their usefulness.
Scenes described on the call sheet
Joshua threatens Cade, then ridicules him an Yeager enterprises
Bumblebee rescues Cade
Attinger questions Cade
Darcy challenges Joshua on the fossil find
Fighter crashes through grating
Crosshairs driveby
Fighter dives into tunnel with fireball in pursuit
Autobot surveillance