Gamestop/EB has added Facebreaker into their system and listed it with a tentative release date of November 4th. While this may not end up being the final date it does give an indication of about when to expect it.
The initial expectation was that Facebreaker would be out in the fall and this lands in the most open spot based on the several other EA Sports games which come out in those months. That would place it between early October titles such as NBA Live and FIFA and a likely mid-late November release of March Madness. So looking at the calendar the most likely possibilities appear to be 10/21, 10/28, 11/4, or an early December date. This also is a sign that Fight Night Round 4 wont be out until sometime next year.