Dolph Lundgren loves working with the “terrific” Amber Heard. The ‘Rocky IV’ star featured alongside Amber in 2018’s ‘Aquaman’ and the hotly-awaited 2023 sequel to the DC blockbuster. A petition to have Heard removed from ‘Aquaman and the Lost Kingdom’ has reached 4.5 million signatures as the world awaits a verdict in her defamation trial against ex-husband Johnny Depp, but Lundgren has thrown his support behind the star. The 64-year-old actor – who plays King Nereus in the ‘Aquaman’ franchise – told Redline Steel CEO Colin Wayne: “She was great. I worked with her on the first ‘Aquaman’, now …