Physics will dictate ship behavior anyway. ...
We'll start with that - however the physics get implemented will dictate combat entirely
. If the devs are going for a real, 6-directions of freedom, inertial system; ships will fight like nothing in either
Star Wars or Star Trek. That's because Star Wars uses primarily fighter combat (I believe the Death Star scene is straight
out of a WWII flick), with banking and maneuvering styled after the way fighters fly in atmosphere; and Star Trek combat resembles old naval combat but in 3D - ships line up against each other and fly around shooting, but there really isn't much global strategizing or planning going on - the one thing most people here would appreciate is that it relies heavily on boarding, which SW does not (another point of mine - little combat
boarding will likely happen. In SW - two entire death stars with their hundreds of thousands of troops were destroyed by single-seater fighters; the executor was destroyed by a lucky hit to the bridge and the nearby gravity of the DS, and star destroyers and mon-cal cruisers get blown up left and right by single-shot weapons). I've heard it's similar to ancient galleon or age of sail warfare, but I'm not positive that's right.
Our combat will probably be like neither - unless we can implement some kind of "flip-block" that allows ships to somehow do physics-defying stunts, we're not going to fly around like in SW. Star Trek is likely off as well, since they also bank and turn in ways that our ships won't likely be able to. If distances are huge, we may find ourselves fighting at sensor-lock distances (whatever those are - WWII battleship/modern day missile cruiser combat); or we may find ourselves needing to match speed and heading if ship speeds are high to cover those distances (age-of-sail combat). Combat could easily be about who finds who first; and turn into a hyper-movement/railgun (submarine combat) war- but the devs have said they don't want that.