I support LGBT characters. I support pansexual characters. What I can't support is changing pre-existing characters who were established long ago. Peter Parker isn't pansexual, and hasn't been that way in more than 53 years of publication. Not in movies, not in cartoons, not in video games, not in comics.
Why is the topic of diversity always focused on sexuality, race, or gender? Comics today are more accepting and inclusive than ever before, and that's a great thing. As someone else mentioned, why aren't there more diverse body types? How about more characters who deal with mental illness? Characters with Autism? These are just a handful of topics that could use more inclusion. Why is "diversity" always limited to either sexuality, race, or gender?
People need to stop saying "I want a Peter Parker who is (this race/this sexuality/this kind of person" or "I want a James Bond who is (this race/this sexuality/this kind of person)," and instead accept the characters for who they are. It's impossible to change characters to reflect everyone who is a fan of that character. Peter Parker is as he is. James Bond is as he is. They've been popular for decades the way that they are. Why see them changed? Why? Why not, instead, support the kind of characters you want to see? Or make those characters? Or at least make your voice be known that you want those characters?
I'm against changing established characters. That's it. Bring on the diversity, bring on characters who more reflect our world and the people who read these comics. Bring on characters who face the same issues we face. But you don't need to change characters in order to do that.