Re: Which X-Man has received the least development in the films?
At least with Cyclops, they explored his relationship with Jean Grey a bit. Colossus never had a real story-arc in the movies.
WOLVERINE X CYCLOPS X STORM X ROGUE X ICEMAN X PROFESSOR X
X-MEN - FANTASTIC FOUR
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MISTER FANTASTIC 4 INVISIBLE WOMAN 4 THE THING 4 HUMAN TORCH