It's been there for a long time, but the kanji character on Terryman's forehead is "米" which means rice.
The USA is formally written as "米国" pronounced as "mikoku" in Japanese, literally meaning "rice country". Although most anime characters refer the USA from the katakana "foreign word" アメリカ "America"
Therefore the "米" marks Terryman as an American. Also his trademark cowboy hat, as if all that wasn't obvious enough.
p.s. This week's episode is actually episode 1.
Last week was episode 0, a recap, although there's plenty of original art, mostly of various "good" chojin standing around watching KM and Terryman spar, reminiscing about previous events.
A new set of themed villains literally falls from the sky to challenge Kinnikuman and friends.
They look like Fighter D could have made them up...