Board Thread:Questions and Answers/@comment-116.65.70.72-20130325123118/@comment-5527544-20130420144846

This is just my theory, but Ultra Galaxy takes place decades after Ultraman Mebius at least, by that timeline Hayata should've been around 80, 90 years old. He could've died of old age already and Ultraman took his form of when they last merged (In Mebius) to honor his memory