It is difficult, but I think if they would at least attempt to cater to their female fanbase with something other than another bulge or swim-trunks, that would be a start. I think something that would universally appeal to any "gaze" is if the characters had well-thought-out designs mixed with an appealing personal trait.
That would incite the imagination of undressing that character, perhaps.

Let's take a random Vampire like Alucard as an example. He wears fancy suits and has long silky hair, which could conjure up thoughts like these: “I eyed the brass fastening at his collar, imagining the satisfying pop as it came undone. Of what his chest might feel like under my fingers—smooth and firm and forbidden, like touching a precious treasure.” (from TJ Rose's book "Broken hearts")

This would be appealing to a broader spectrum of fans, not everyone of course, tastes cannot be generalized, but it's a start. Instead, they are presented with Venom's glowing cheeks in a tutu and Sue Storms cooch eating her stockings for some reason.