Well why not toss my hat in the ring
1. Will the oath breaker be an option for Paladin? They’re already represented in act one.
http://dnd5e.wikidot.com/paladin:oathbreaker
2. Will a Warlock have the Patron option for The Undead? I mean Vlaakith is one of The Undead Patrons!
http://dnd5e.wikidot.com/warlock:undead
3. Will we be able to join the shadow Druids?
To keep it lore friendly. Find the evidence that they want to take over the grove. Have a dialogue option (Druids only) to keep silent and let them take over the grove. Never mention that they exist doing so exposes them and completely goes against their purpose, even if you agree with them. If you do the above, they will come to your camp one night and offer membership. To keep it lore friendly, if you decline they attack.
