Via Activision's Q4 2016 Financial results:

http://files.shareholder.com/downloads/ACTI/3812388899x0x927408/E8645268-7D4F-4754-8B35-3710DD5C493D/Q4_2016_ATVI_Slides.pdf

So WW2 era?

Could mean a lot of things, such as the old movement system.

AngryLittleAlchemist said:

That image plus your sig are perfect. 

“Sales underperformed. It’s clear that space setting just didn’t resonate” Activision on Infinite Warfare
Infinite Warfare “was not the success we planned.”
TRADITIONAL COMBAT FOR CALL OF DUTY 2017!!!
Via https://twitter.com/charlieINTEL

Thanks :P! Love Kino's Journey. Nice Bloodborne profile pic btw

Maybe they're referring to n64-style graphics when they say "old roots"

I actually still believe Sledgehammer is making Advance Warfare 2 though, No way they had enough time to respond to the negative feedback in just a year, specially when BO3 was a success. But given how things turned out after AW's story maybe they'll defiently turn down the futuristic stuff down a notch. Treyarch will be the one's to bring us back to World War and rightfully so.

2-d call of duty game!