Agreed, and it's more than his appearance. Aspects of Gouki/Akuma's "story" are very similar to Zodd's (warrior who sought strength became a demon). Akuma/Ryu's rivalry isn't dissimilar from Zodd/Guts. Which means Evil Ryu is Guts as an apostleAazealh said:A lot of people have over the years. It wouldn't be hugely surprising if Gouki's appearance had been inspired by Zodd when he was originally created.