#1 Rapunzel Braided - "Tangled Heroes" Set
Characters in the Set: Rapunzel, Pascal, Flynn Rider, Maximus and Vlad (Tangled)

#2 Mother Gothel - "Feels Good To Be Bad" Set
Character guesses: The Prospector (Toy Story), King Candy (Wreck-It Ralph), Pete and more.
Unconfirmed. Let us know in the comments what worked for you!

 

#3 Warthog - Collect Cupcakes Unlock!
Collect 50 Cupcakes with Attila (Tangled) to unlock Warthog.

#4 Captain of the Guard  - Collect Apples Unlock!
Collect 50 Apples with Maximus (Tangled) to unlock Captain of the Guard.

#5 The King - "Honorable Men" Set
Character guesses: Honest and honorable characters like Mayor Lionheart (Zootopia), Felix (Wreck-it Ralph), Adult Simba (The Lion King) and many more.
Unconfirmed. Let us know in the comments what worked for you!

 

NEW #6 Queen - Action Unlock!
Play as The Emporer Zurg (Toy Story) and find the Queen.
 Added in the Monsters INC update.
 
NEW #7 Lantern - Action Unlock!
Play as one of the Haunted Mansion characters and light 30 candles.
 Added in the Monsters INC update.