Daughter Of Snow (Percy Jackson & Avengers Cross Over)

Alyssa Maia Elledge was a normal teen a few years ago, all of that is long gone. As a new threat hits New York City and Alyssa is marked as a vigilante by S.H.I.E.L.D....
What turns is Alyssa's life going to take? Who is what is this new threat? And most importantly what will happen to the campers of Camp Half-Blood?