That star being Randall Park. Park who is also in Ant-man and the Wasp was confirmed to be part of the cast by the director himself James Wan on Twitter.
Now in the comics Dr. Shin is a character Who Tom Curry came to, to help Arthur Curry (Aquaman) learn about his abilities. Then afterwards he became obsessed with discovering the city of Atlantis.
Now pickups, as Wan mentioned aren’t necessarily full on reshoots, they are to many times get extra coverage and in this case add a new character. So my fingers are crossed this adds on to make this film a success.
Aquaman is set to hit theaters just in time for Christmas this year on December 21st.