I'd go for that idea, but I'm a huge Sakaguchi fan. I know a lot of people can't stand his acting style. Personally though, I'd rather see him stick to big action film roles with his new stunt team.
I always thought he would have been a good Takumi Inui, better suited for what Takaiwa was playing the character as in suit. And as rotten an actor as Sakaguchi is, he's Mifune compared to Kento Handa.