It's looking like Wave 10 will be Q4 2021.
That means 3 mass retail waves in 2021.
We're getting to the point where Exclusives may soon outnumber the regular releases.
* I may have missed some, this is just from memory.
2021 Mass Releases:
Leo
Ethan
Syd
Adam
Tenga
Kai
Carlos
Bridge
Cassie
Tanya
Phantom
Riley
Space VS 2-Pack
MMPR VS 2-Pack
*No word on Monsters, disappeared from listings
2021 Exclusives:
Metallic Aisha
Metallic Billy
Metallic Rocky
Metallic Adam
Cell-Shaded MMPR Pink
Kat 2-Pack
Space Villains 2-Pack
A-Squad Red
A-Squad Yellow
A-Squad Green
A-Squad Pink
Andros in Cloak
Cog 2-Pack
MMPR Shredder (Fan Channel Exclusive)
MMPR Red Sentry
Status Unknown, but likely to be Exclusives:
MMPR TMNT 2-Pack #1
MMPR TMNT 2-Pack #2
MMPR TMNT 2-Pack #3
Also, there's a rumor that "In Space Silver" will come this year, likely as an exclusive.