C/P my post from the AW thread.
Spoiler for just in case:
Well at the end of Vol 9, this is the preview for volume 10, which basically it's
Kirito Vs. Haruyuki.
I really hope this book is canon, if it is I wonder if by any chance either AW or SAO get sub-forum, we can potentially merge the two series together since the characters do exist together one point in time, which would be really, really awesome.