I don't get how some Smash fans can be so close-minded when it comes to character selection - thankfully, I haven't seen that on this forum (at the very least, I've only seen one person being salty about Kazuya's inclusion in the reports), but I've seen plenty of people on sites like Reddit acting like this is the worst decision they could have made because it's not (insert the 1-3 characters that the person wants to see), or because it's "another" fighting game character. (because four fighting game characters, mostly from different series and different companies, in a roster of almost 90 is clearly overdoing it)
If it was the 1990s or early 2000s, it would make more sense - most gaming information was relayed through magazines, or gaming sites in their early infancy, and games were physical while re-releases weren't as common. However, it's 2021. Youtube exists (meaning that, even if you can't play a game, you can still look up footage of it in action), Steam is a thing (which helps with being able to play third party titles), and plenty of games are available to download in one form or another.
When Brawl was announced and I only vaguely recalled who Snake was through older Nintendo Power issues, I didn't complain that he was a terrible addition - I went back to those Nintendo Power issues, looked into the game, and decided to order it through eBay to give it a try, and Metal Gear wound up becoming one of my favourite series. (I wound up playing all of the main titles, even getting the PC version of MGS2 that required fan-made patches to work well since I didn't have a PS2)
It's baffling to me when I've seen people complain that Kazuya's "just another 2D shoto", when watching less than a minute of Tekken's gameplay would make it clear that almost every part of that statement is incorrect. I apologize for the rant; it's just frustrating to see some times. (and I'm not even a huge fan of Tekken - I got into it a few years back when I found the Wii U version of Tag Tournament 2 for cheap - so I can't imagine how annoying it must be for them)