Susumu Kurobe would make the most sense of the two, as he's been in several Toho films in addition to playing Hayata in Ultraman.
..I think it would dictate us creating an entirely new episode of Ultraman Sorta just to incorporate him into the series somehow (in addition to the ones already in production now!). XD
Speaking of! Unless something goes TERRIBLY, HORRENDOUSLY WRONG, Episode 3 of Ultraman Sorta - "A Moderately Threatening Invasion" - is set to be released at G-Fest's amateur video contest! Saturday, July 10th!
Eiji Tsuburaya's Birthday!
*excited*