ALT 1. Doctor Doom 2. Darth Vader 3. Obito Uchiha 4. Darth Sidious 5. Mujin Park 6. Sephiroth 7. Megatron 8. Black Hand 9. Magneto 10. Ryomen Sukuna 11. Conquest 12. Valkorion 13. Pain 14. Amon 15. Ultron

ALT Tim was already in an established relationship with Stephanie (which has decades of history) and was only growing stronger, then all of a sudden he breaks up with her offscreen without any reason behind it only to show up later dating a character named Bernard (who btw, in his original iteration was so obnoxiously heterosexual that he pissed Tim off to the point of warning to stop instantly because he was so horny for his stepmother and was making jokes about having sex with her if he was in Tim's position.) After this Stephanie is forced to immediately accept it despite being ghosted and having zero proper closure during this, she even had to meet his new boyfriend and act supportive despite having zero compulsion to actually do so prior and made to feel as if her feelings don't matter in the long run.

ALT Jonathan already has the very unfortunate problem (that people hardly actually bring up) of being a kid forced to age up and spend most of his teen years getting tortured and upon returning has his first (and final) heterosexual relationship with Saturn Girl who was from the future. After this and presenting his bisexuality he would never have a female love interest again as of this date (even to the point of rarely having dynamics with other female characters.) Once they finally started to make his boyfriend Jay interesting and a worthwhile character they break them up and potential set him up as a justified villian in the future, ever since then every relationship tease has been solely catered towards the same sex and all of his female options are ignored, except for Dreamer which also works as a queer relationship for Jon through being a Trans woman and having history and an actual dynamic with him as a character (who also doesn't flanderize his character for the sake of being bi.)

ALT Kitty (even from her original creator Claremont's own intentions) had always showed signs and hints of being bisexual and most of her defining relationship and dynamics is with women. When it comes to dating males it's an unfortunate case because Kitty would start out being groomed by Colossus making her a victim who was repeatedly forced to rebound and be tied to the same man until she was finally allowed to move past him (also with being young and having to have problematic relationships she ends up getting put in relationships just for the sake of it without actually having a purpose.) Recently she's finally be allowed to confirm her bisexuality by having multiple romantic interactions with the same sex, but still not to the extent of having a full on relationship and becoming intimate with (even her famous ship with Illyana hasn't been considered yet and her history with Colossus only exists to hamper that possibility.)

ALT Felicia is another character that wasn't shy about this being her sexuality and was one of the ones with direct confirmation for it, yet despite that you can count more times of her either being with Peter or having one night stands with other male characters than you can with her having a relationship with the same sex (and with a female whose actually a character and not a off screen "here you go" trophy.) This isn't even surprising but it becomes even worse when they refuse to commit to PeterXFelicia (despite the decade long ongoing problem with the Spider-Man comics) and just use her entirely for Peter's own benefit or as a reward for him instead of actually allowing her to have a equal grounds relationship with someone who has that level of history and connection with her. Whenever she's not having a fling with him, they oversexualize her and even use her to make Peter mad whenever she's with another male character (which is sad if you know anything about her past or upbringing)