So 2 significant things.
- Mimiwarigumi leader and one other samurai look entirely unfazed by Orochis beheading. Either they know something or they are seriously just not scared. Even Fukurokuju was surprised.
- The person drawn in 982 definitely was not Izo. Izo's coat does not have the same pattern. Oda is well known for his detail, this is another person being hidden, im sure of it now