Board Thread:General Discussion/@comment-26337668-20150523134701/@comment-26337668-20150527135027

It is Shredder, in the clip Leo himself refers to him as Shredder. So unless Leo is wrong, we can  say that this is Oroku Saki before he became Shredder. I think he wears the clothes that looks like Splinter's because then he was still a part of the Hamato clan. He didn't know the truth about his origin. I'm sure Splinter and Tang Shen will show up.

For a second because of clothes I thought it's Splinter and I think maybe the turtles thought the same, but then in the clip Leo said it is the Shredder. Maybe Leo is wrong.