My memory may be bad, but I remember Schierke handing out all the weapons to the group in the treehouse, and finally handing Guts his axe. Guts refused the axe and turned around, with the DS in full view, Schierke had this surprised look on her face and she said "That is..." or something like...
It will end with a tentative "peace deal" between the apostles and the humans, leaving all the open questions unanswered. A few months later, an MMPORPG will be released where you can choose to be an apostle, a member of Guts' new band, or an anti-Griffith apostle.