What I generally do is mix different costumes that the character has worn to get the final product...like look at my avatar right now, it's a mix of old Blink and new Blink! 3nodding
My original Blink TekTek:
AoA Blink:
Mimic:
Nocturne:
Namora:
Namor:
Moon Knight (Completed):
Typhoid Mary:
Callisto (Completed):
Wolfsbane (Completed):
Super-Skrull Rogue:
Skaar:
Hepzibah aka The Most Expensive Cosplay Avatar Ever:
More to come....
