Alright I found something new to discuss.
It's real blurry at parts but this was posted by a 4chan user. I'm not sure what it means for the bottom 3 characters and yes our very own KOS-MOS is on it as well as the other two cat leak characters. The above timeline seems VERY SOUND, imo. Now, this all relies on cat leak being true but let's say KOS-MOS, Reimu, and Hayabusa are indeed all developed in 3 like Joker, Hero, and Banjo were. If KOS-MOS got a game awards reveal it would make so much sense. Cat leak name dropped the other two characters .... Verg says Hayabusa is moved to post pass months after the cat leak, and we have the Reimu thing with the doujin circle. Now, the bizarre thing about this theory is that Terry is just.... kicked out and cat leaker (ASSUMING if it is the same person) knew about Banjo's codename but knew nothing about Terry coming? So Terry was secret if we can say.... and that doesn't add up, imo.
However, the cat leaker mentioned Reimu and Hayabusa were EARLY DEVELOPMENT, right? So then wouldn't this rule of 3 thing make sense?
I dont know if i'm even understanding this theory correctly so someone can take over if they want but this theory seems relatively sound at least the TOP part. I'm not sure about the bottom. We've give reasons for piggybacking already such as papagenos making that video and someone could copied the Banjo buddy guy, etc. Reimu leak was seemingly debunked and then lives again thanks to SNK getting 50 songs, etc. I also mentioned in a previous post the the fighters pass did extremely well financially so it is REAL possible that the next fighters are all 3rd party again. But in order for this theory to be true, KOS-MOS 100% has to be #5 and Sabi is theorizing that the game awards are going to be exciting. Not saying I believe Sabi but if KOS-MOS came with Xenosaga HD or is part of Xenoblade definitive edition... she can be #5 very easily, IMO.