The face tats got me thinking that if Marvel can double-cast Alfre Woodard, peter Mensah and Matt Gerald, I wouldn't mind Dichen Lachman as Moondragon.
I feel like they need to cast an Asian actress since Drax is played by a Filipino actor.
Celina Jade is my first choice. Dichen Lachman is my second. Maggie Q is my third. Jeeja Yanin is also a strong choice as are Jing Tian, Tao Oakomoto and Zhang Ziyi. I'd try to audition all of them alongside Dave Bautista to test for chemistry.
Also, what about her gf? You can't have Moondragon without Martyr and given that Mar-Vell died 25 years ago, she should be a grown woman.
I'd have to say Emily Blunt as Phyla. She's my top choice for Sue Storm but she'd be a great Martyr as well. I'd also take Rose Leslie, Kathryn Winnick, Alicia Vikander, Evan Rachel Wood, Katrina Law, Ellel Hollman, Mary Elizabeth Winstead, Gwendoline Christie, Emily Beecham, Lauren Cohan, Lea Seadoux, MacKenzie Davis or Katee Sakhoff.
Nova should be Wilmer Valderamma, Pedro Pascal or Diego Luna. Coming up with Hispanic actors is hard and all of these guys are older than I'd like for Nova.
Michelle Trachtenberg for Nikki Gold. I can't see anyone else in the role.
I'd like an unknown as Adam Warlock and then cast Magus based on who they cast.
Terry Crews as Maxam. Much like Nikki, this is the only option.
And the Guardians team after 3 would be Adam Warlock, Nova, Moondragon, Martyr, Maxam and Nikki Gold. Possibly also Major Victory as well but we'd also need Justice in Avengers for the same reason why I can't fancast Magus without knowing who's Adam.