Lundgren played King Nereus, an Atlantean king and father of Mera, in the first film.
Aquaman became the biggest success for the DC films, which have a history of faltering at the box office, with the exception of Patty Jenkins’ Wonder Woman.
“I may be doing Aquaman 2 this summer, shooting in London,” Lundgren said.
“And that’s coming out the following year in the theaters, they hope.”