Watto
He should definately be in ep3
Just think of the lines he could say
like for example....when news reaches tatooine that the jedi council were wiped out by anakin
he could say
'I used to be his boss'
*sighs happily*
You have to have the blue man.
So who would you like to see in ep 3
Cameos say....people from the OT
People from ep1 who you dont see in AOTC?