https://www.cnet.com/news/netflix-new-ultraman-anime-trailer-shows-off-mega-monster-battles/

"Shin Hayata's son Shinjiro seems to possess a strange ability, and it is this ability, along with his father's revelation that he was Ultraman, that leads Shinjiro to battle the new aliens invading the Earth as the new Ultraman," according to the Netflix description. 

The new footage also reveals that the reptile-like monster Bemular and a new threat called Pseudo-Man, among others, will come up against Ultraman.