One has to wonder... in the Kelvin Universe, do Sarek, Amanda and Michael acknowledge Sybok's presence? I feel bad for the guy in DISCO... they act like he doesn't even exist![]()
It's like they embrace the fact Roddenberry and DC Fontana didn't consider him canon..but by that logic, the next trek iteration would decanonize Michael too since the issue with Sybok wasn't the character itself but the fact it was Spock's brother and the original writers wanted Spock to be an only child instead for specific reasons. So maybe they ignore him just because they aren't interested (in fact, I doubt they'd care about Roddenberry not liking stv) which confirms that canon and continuity isn't always respected. It isn't a given.
I think Sybok is an easier retcon to handle though because he left when Spock was a kid so he wasn't part of his childhood. If they wanted to, he could always show up in the movies. With Michael, on the other hand, the retcon is so big in Spock's story and his family that it's hard to believe she could exist in this timeline too without us seeing her or getting a mention when we saw kid Spock.
But then again, Michael doesn't work much with tos continuity either. It is inevitable. With all the stuff that happened to Spock and she was never mentioned (eg when he died) not to mention old Sarek later mentioning only Spock and Amanda and Perrin (the second wife) when he remembered those he loved and his family. Disco made it obvious Sarek loves Michael and might even have a preference for her, so him not mentioning her later in life isn't a tiny little detail. Unless, again, she truly is a canon inserted character result of someone altering tos past.
My approach to retcons and continuity generally is like 'I don't care' lol, because I just know that new iterations/sequels/prequels always have these issues and you can't try to rationalize things too much. Sure, I prefer it when continuity is kept and things make sense. If someone made a sequel of these movies and they ignored big aspects of them I wouldn't be so forgiving, I'd consider it bad writing and lame period. But when it comes to tos and the old movies, there are details and aspects that new trek iterations might not have to necessarily mention.
Retcons aren't new to trek so it isn't a big unforgiveable thing but, to be fair, discovery's creative team is making it such a big deal that they will explain why Michael wasn't mentioned in tos and everything will make sense that they are the ones, in a sense, making it hard for fans to give them a pass. They are the ones exposing themselves to more criticism (as if trek fans needed encouragement lol) especially if the big reason they provide won't be believable. IMO they unnecessarily put themselves into a big trap with no way out, especially if they are building up hype with the promise of giving us all the answers but don't really give them in the end or the answer is too lame.
Maybe I'm pessimistic because I saw it happening in other shows (Lost anyone? Lmao), but I don't have much confidence that Discovery will be any different or less manipulative (of the audience).