A truly successful character will have hir own niche. Wonder Woman is confused with Superman in some minds specifically because their powers are so similar. For example, the X-Men’s Iceman is the prototype for all ice-powered characters like Frozone, Killer Frost, Elsa, and Sub-Zero. Black Lightning is similarly the centerpoint for iterations on “electricity-powered”. Sunfire, for all his potential as an Asian male, Japanese nationalist, and potential LGBT+ is still just another fire-blasting flyer in a world that already has a very, very popular one.
KB is right about coal/volcano/ember/ground-based” niche of “fire”. What is the status of the old Thunderbolts character Charcoal? GAH
https://en.m.wikipedia.org/wiki/Charcoal_(comics) Effing hell. Dead, and in legal limbo.
Ugh Charcoal would've been perfect. Young, powerful, and a powerset that could require mentoring from a variety of strong X-Men personalities. Transformation with Colossus and White Queen, Thermal powers with Iceman and Sunfire, Energy with Gambit or Cyclops, elemental powers with Rictor and Storm... Disney pay the poor people.