Nah, that's entirely possible. They just pulled the same thing with Super Mario 3D World and Link Between Worlds last year. Arguably their two biggest titles of the year. Also, Luigi's Mansion 2 and another Pokemon title in the spring last year. So they've done it twice now actually.
Also, this is the last friday before Black Friday. It would be a great boost for them to have it out in time for Black Friday, and any later would be releasing it ON the day.