I think its safe to say its the hint of a release date. There are two lunar events between October and November.
The first is October 18th.
Penumbral Lunar Eclipse. A penumbral lunar eclipse occurs when the Moon passes through the Earth's partial shadow, or penumbra. During this type of eclipse the Moon will darken slightly but not completely. The eclipse will be visible throughout most of the world except for Australia and extreme eastern Siberia.
The second is November 3rd.
Hybrid Solar Eclipse. A hybrid solar eclipse occurs when the Moon is almost too close to the Earth to completely block the Sun. This type of eclipse will appear as a total eclipse to some parts of the world and will appear annular to others. The eclipse path will begin in the Atlantic Ocean off the eastern coast of the United States and move east across the Atlantic and across central Africa.
I think it would be a great marketing strategy to coordinate with something special since the lines at the stores for the pick ups of the preorders would atleast provide somethign to look at.
I think what else there is to consider. The 3rd of November is a Sunday, however 11:59pm November 2 is a Saturday evening, not entirely out of the questions to hold a launch on that evening if you ask me.
I also think that the October event would also work nicely. Thats atleast an educated guess at it.
I can guarantee you it's not being released on a Sunday. Almost nothing happens on Sundays outside of decor and home improvement stores having sales.
Sunday has the shortest business hours for malls, people go to church, have family get togethers, do home repair, play sports...it's awful marketing-wise. Having something on a Thursday, Friday or Saturday creates a buzz over the weekend.