I'm conflicted
As a history lover, I usualy don't tend to enjoy studying wars so I think it says something when I say that WWI is my exception. I find The Great War fascinating and have researched that entire period obsessively.
Like Charon, I'm glad to see SOMEONE attempting a WWI game, but...man that trailer did not convey what The Great War was about at all. It looks like typical Battlefield shenanigans. Bear in mind that WWI was not a glorious war, it was not a WWII style war of heroes and villains. It was a war that shattered the psyche of western civilization, virtually everyone involved was responsible for its outbreak, and it proved to the traditional 19th Century military structures that war had changed into a brutally horrific, disturbingly efficient tool of murder and annihilation.
worse yet it wasn't even balls-to-the-wall exciting. For most soldiers, your life was in a trench, waiting out each day as artillery shells bombarded your line and you witlessly cowered hopping you wouldn't get blown to bits. This was your routine until one day, your commanding officer suddenly shouted at you to "go over the top" whereby you'd be subjected to intense turret fire and most likely get your head blown off.
Those Arabic cavalry, tanks, and even the Bi-Planes were miniscule additions to the war machine, in fact, by 1917 the cavalry units were no longer in use, and Bi-Planes only engaged in dog-fights when their cover was blown attempting to spy on the enemy line. That's not to say thety weren't extremely useful, they were, but not in the Hollywood style way we think. The tank, tough, was an extremely useful addition, but again, it wasn't this explosive dynamo we think it was. It broke down constantly, would move quite slowly, and often times got tangled up in debris.