So I came up with a somewhat comprehensive list of notable teams that got left out...
(this is a bit biased since I watch most of the NA circuit stuff, but not a ton from the other regions)
(and yes we theoretically knew about some of these ahead of this announcement seeing as how some have disbanded already)
APAC: XERXIA, Vision Strikers, DAMWAN Gaming Kia, NORTHEPTION, Crazy Racoons, NUTURN, FULL SENSE, BOOM, ONIC G, X10, F4Q, and BREN Esports
Americas: OPTIC, XSET, TSM, FAZE, V1, The Guard, RISE, Pioneer Knights, ANDBOX, Shopify Rebellion (formerly Luminosity), Immortals, Vikings, NIP, Liberty, Sharks, Gamelanders and Vivo Keyd
EMEA: Ascend, G2, Guild, FPX, M3C/Gambit, SMB, OG LDN UTD, Team BDS and Mad Lions
I'm probably missing a few. If you can think of any that should be added feel free to let me know and I can try to edit this post.