If that does change, then Jon's romantic relationship that he had with Saturn Girl will have to be retconned. For now, he's bisexual.
Well...It's already kind of a retcon, if the intention of Jon's creator, and whichever writer and editor were behind the Saturn Girl affair was to present a straight character. A retcon that retcons nothing, you might say.
It'll be interesting to see if they ever allow him a physical relationship with a female ever again. If they DO, then fair enough, he's bisexual. But if they don't, then they can call him whatever they want until the cows come home but the reality is he's for all intents and purposes a gay man.
What is it so mandatory that Jon becomes gay or bisexual, is being shown as a straight man so evil today then?