[BarbaraGordon]

We already know about the four Gotham Knights figures (Batgirl, Nightwing, Red Hood, Tim Drake Robin).

Photos of Unpainted/Artist Proof Lobo, Gotham Knights Red Hood, and Rebirth Superman have already been floating around the internet.

These have been rumored for the Black Adam movie:
Black Adam
Black Adam variant
Hawkman
Dr. Fate
Dr. Fate Unmasked
Cyclone
Atom Smasher
Atom Smasher Megafig
Sabbac Megafig

Some more potential figures have been floating around online:
Hush
Batman vs Hush 2-pack
Red Robin (Tim Drake, not sure which costume though)
TV Flash Season 7
Wally West Flash (red suit)
Duke Thomas (Dark Nights Metal)
Jonathan Kent Superman (Future State)
Martian Manhunter
Martian Manhunter Gold Label variant
Another Batman Who Laughs
Anti-Crisis Wonder Woman
Grifter
some sort of Joker "Dragon" vehicle

Finally, there will probably be a few based on Aquaman 2 (the movie is currently scheduled for December 2022).

Aquaman?
Mera?
Black Manta?
Orm Marius?