10. Shin was an experiment of Orochimaru. He was apparently working on Shin uchiha for a long time, since the prosthetic arm that Danzo Shimura received was also carved from his body.
9. Shin Uchiha was fixated on the Uchiha Clan, especially Itachi Uchiha, so much that he took the name for himself.
8. Shin Uchiha also plotted to revive the Akatsuki, about 15 years after the 4th Great Ninja War.