I'd be interested to see if DICE can make WW1 a fun romp in the way other battlefield games are, movies and games have given us glamorous looks at WW2 but i feel for most people WW1 remains a very sombre and horrific thing, if they do go this route i'm not sure a Hollywood action movie approach would make sense.
Verdun was the latest attempt at a WW1 shooter, by restricting itself to infantry trench warfare it lined up with peoples ideas of the war, to have people driving around making ragdolls flip about in typical Battlefield style is another thing.

True, looking at the last battlefield games published, specifically BF4, the battlefield series had reached the highest peak in combat speed that it ever had. Battlefield 4 can be pretty damn fast (specially with the greatly tweaked network). WWI with very few automatic weapons, will be hard to do that.
I would love to see them give a take at that though, wonder what kind of improvements would they bring.
They would have to make their death physics even better and the feel of shooting, specifically bolt action weapons, pretty god damn satisfying since thats what should mostly be used.
Also, WWI battles where mostly on very open fields, so I don't see a lot of margin for building destruction or any "levolution" (not that I care about the latter so much though), so It would be interesting to see them play more with ground destruction, having massive holes done by mortars that you can use as cover, or even being able to create and dig your own trenches.
What do you guys think?

I'm kinda worried that the scope of WW1 battle might be a bit limited for a game; that said, if they have planes, I would love that as a fan of old WW1 flying games such as Wings or Knights of the Sky.