Those toothpicks are absolutely perfect! I was thinking it might be a styrofoam cone, but didn't think of the plastic wrap. I was wondering about that.
Some ideas keeping in the Italian Antipasto theme:
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Counterclockwise from top, tiny fresh mozzarella balls. I like them marinated, just a quick dip, because they get mushy if you leave them in any kind of acid. Or if you don't want to marinate, maybe a nice fresh basil leaf next to it, capped with a marinated sun-dried tomato next to anchor it. The next one is a cooked tortellini. You could marinate that. The bottom left is a nice mortadella. Could also get a thicker cut, and make cubes of it, if you don't want to fold the thin slices. And the last on the right, a good prosciutto and melon. Might make a nice contrast on the palate from the other items, a nice sweet and salty bite. Or what about some shrimp? Not sure if you guys are seafood people.
Maybe if I am feeling well enough I may try and do this on NYE, but not as large. I gotta say, well done, you! Great idea. I really wish I had this idea when I did catering in the past!