Patch notes for tomorrow? Get Hype?

Are we expecting a patch for the launch of season 1 pvp and mythic+? Is it posted somewhere / did I miss it?

Or is everything already built in and ready to go the way they want it and it is just going to roll over into Season 1?

Is this a multiple choice test?

https://us.forums.blizzard.com/en/wow/t/shadowlands-season-1—preview/761553