I'll say 5m for Titanfall on X1 (9m on all consoles combined) and 4.5m for DK.
DK, like you said, sells pretty consistently. And Titanfall may be a new IP, but it's from a respected group of devs in regards to FPS's and it has a hell of a lot of hype behind it, so 9m doesn't seem unreasonable to me. I expect that the 360, with it's huge install base, will still make up a large portion of the games sales, as will the PC
Infamous is the only questionable one. It isn't a numbered title and it looks to be quite a change from the first two, so some of the Infamous fanbase might not be getting this one. It is getting a lot of positive feedback, though, and could definitely pull in lot of new people. It could very well be the best selling Infamous. I'll say 3.5m.
