Haven't found any changes to the old figures. Level cap is 20 and you have to reassigne the skill point, but your old skill point assignment seems to be shown on the tree.
Not sure if my memory can sort out the new ones so here's a list of themes
Part 1
Disney infinity
Vintage
Fantasyland
Tomorrowland
Andys room
Agrabah palace
Beasts castle
Beasts ballroom
Auroras cottage
King Stefans castle
Dwarfs cottage
Cinderella castle
Rapunzels tower
Snuggly duckling
Small world
Minni mouses house
Down the rabbit hole
Emperor Kuzcos palace
Nemos fish tank
Darling nursery
Olafs summertime
Inside out
Carl Fredricksens house
Part 2
Death star
Mos Eisley cantina
Jabbas palace
Hoth echo base
Ghost freighter
Captain America
Helicarrier
Hulk
El capitan theatre
Freds lair
Litwaks arcade
Nicelanders
Haunted mansion
Flynns arcade
Tron
Doofenshmirtz
Gravity falls
Part 3
Spider-man walls
Guardians of the galaxy
Jack Skellington
Disney cruise
Stark tech