Yeah, no Happy clichee ending, great!
Hayate is most probably not Hayate but Katsuo!
And Maya was his sister.
Well Kirika's child, i dunno.......
Well anyways, Katsuo really died i think and now is controlled by the beastman (forgot the name), so his body is the container for the evil Skullman.
There will be no 2nd season.