It does. But MS was in the situation of (a) preventing a blockbuster IP from going multiplatform, (b) buying the IP rights outright forever, and (c) cancelling/shelving an unproven IP (Black Tusk project) and replacing it with a very successful IP.
They made the right business decision for sure.
A and B could've been accomplished without C though. It remains to be seen whether another Gears from a new studio can achieve the same kind of success as the previous entries. And depending on how far along Black Tusk was with the new IP, it's arguably a bad decision to drop it and start over (especially if the team was passionate about the project).
If they announced a new IP today by the time of release people would just go oh yeah that game
If it's a new IP I think they need to keep momentum and not a huge gap between reveal and release and right now Titan fall is that IP that needs momentum
Titanfall releases in March. I can't believe that they wouldn't have had the space in their lineup to not be able to announce and market a new IP for 2015 or beyond.