I know this concept has probably been posted to death at this point but after another watch through I’m prettyy convinced of (at least) the characters below. I’m looking forward to another run through to see if I can find any more confirming Easter eggs.

Ted - Dorothy - goes back to Kansas after the adventure - gives ‘no place like home’ speech at last game

Beard - Toto - gets out of the plane before it heads back to Kansas just like Toto jumps out of the hot air balloon basket

Jamie - scarecrow - needs to find a brain

Roy - Tin man - needs to find a heart

Rebecca - cowardly lion - practices in the mirror to act like a lion to feel big and confident

Dr Sharon - the wizard

May (who has a wizard of oz pinball machine in her pub) - Mayor [‘May’or] of the munchkin city (Richmond)

Three bar patrons - lollipop guild

Rupert - wicked witch of the west (wicket witch of WEST ham)

Keely - Glinda the good witch of the north