Before Ubisoft's E3 press conference ended, CEO Yves Guillemot approached for a "one more thing" tease. And this year it was a big one: Rainbow Six Siege. It's coming in 2015.
A 5v5 gameplay demo from a pre-alpha state featured the team scoping out a house with a hostage situation, then bursting in and mopping up the badguys. You know, as they do.
The company also confirmed to Polygon that Rainbow Six: Patriots has been canceled, calling it a "strategic decision."