What an exciting find!
I’ve often wondered how much is left in the so-far-unidentified mass burials after large battles, for example those reported in Caesar’s Commentaries on the Gallic Wars, or the Civil Wars. Of course, finding the actual sites is tricky. From the Second Punic War:
http://thethirstygargoyle.blogspot.com/2013/07/armageddon-on-aufidus-locating-battle.html
Interesting, I also studied a lot Roman history in most of my ancient History classes in HS and in college, and the 2nd Punic war was one of my favorite periods in Roman history to study.
I don’t have the link handy but there is a good BBC documentary on you tube called Hannibal The Nightmare Of Rome, very good for a docudrama.