Al the PHB classes are confirmed so those would be in the game. But there are few in the EA, as announced.
https://www.pcgamer.com/baldurs-gat...-with-6-classes-and-5-origin-characters/

There are more links in the "Subclasses and EA" Thread.

Classes and subclasses confirmed are in
https://baldursgate3.wiki.fextralife.com/Classes

Druids have access to around 100 beast forms at level 8 (plus elemental forms at level 10 if you are a moon druid) so I do not think we could see all of them, but I expect you will have some beast wild shapes you can choose from. I also hope you can switch forms outside combat (and summon creatures or familiars too). I hope the "PoE" syndrome is not contagious...

I hope they could add the Artificer later on... maybe as a DLC?.