I actually don't know why the book was signed by Colan and Thomas, I only asked for the Stan sig, I supposse because the signing events were overlapped, none of my books were to have Colan but, it was so many boooks that my request must have been misunderstood , on the other hand, now that I have the book, I don't mind the other two, I really like me this Italian AF15..
Well , I hope you're happy.
There are no credits in the GCD or ComicBase. I would imagine that the other signers could have contributed, given that it's a foreign book and it's not unusual for foreign publishers to stick parts of various books together. Some of these had Dr. Strange in them as well as Ant-Man.
Regardless, it's a darn cool book!