I was sure that when CAWADOODY: INFINIIT WÄRFÄREE was announced, next BF would Battlefield IN SPAAAACE, so this is in some way a pleasant surprise. Also, lots of lovely little details...
...and then it's another modern shooter designed to be "epic" rather than realistic, complete with launch day DLC, "season passes", unlockables, no mod support, playercount capped at 48 because consoles (which would finally have enough memory to run more!), heavy-breathing-gains-health mechanic, 9mm and 75mm rounds doing about the same damage and requiring multiple shots to kill an unarmoured human, even more ludicrous flight physics than BF2, and maybe, just maybe if we are lucky, no pay-to-win mechanic.
Still, it's at least an original idea and not directly copying the competitors, which are pretty rare nowadays, and there's never enough WW1 games around, so I remain cautiously positive. Dare I hope for an optional "hardcore mode" server setting?
Regarding "Seven Nation Army", at least the name fits thematically to the Allies, but I think the real reason for its inclusion is that the exact same remix was used in the trailer of GI Joe: Retaliation. Though, I would have preferred something like a somber piano deconstruction (The Dark Knight Rises trailer 3, The Force Awakens theatrical trailer style) of the Battlefield theme (the Blackadder theme obviously being unavailable), while the narrator reads In Flanders Fields in the background.