Dude, my dude.
Rey, the rando orphan on a desert planet, is the SECRET LOVECHILD OF A CLONE OF THE EMPEROR. They just can't help but tie anyone with force powers into just 2-3 bloodlines.
She's not a random orphan, we knew from the star she was brought there by her parents lol. Thats revealed in the first movie.
How is this any different than Luke Skywalker being the son of the most powerful dude in the galaxy??
I've virtually 100% confidence that most of the jedi types we see in this trailer are gonna be direct ancestors of the Jedi we already know. And if they can stretch some ages out a bit for a cameo, like Yoda and probably baby Chewie and yes, Dooku, Grevious, and who knows who else (R2D2?), then they will.
Like I said. You're making things up. Disney hasn't done this since they bought the franchise.
In fact the one example that you brought tup was a half asset reaction to a fanbase enraged that rey was actually, related to NO ONE. That was the best possible direction to take her character and yet the "fans" complained so much that Disney went back on it.
So let's not pretend that a bunch of people don't actively ask for that sort of storytelling in these things because they do, and when the franchise goes another direction they complain, but also when they actually do establish connections they complain.
High republic content has been going on for 2 years in comics and books, several installments and series. To date, Yoda is the ONLY established character to have appeared in any of it.
You just donr have a concrete basis for any of this. You are treating this like a trend when it's actually the opposite.