Cricketers: Mohd. Azhar, Siddhu, Sunil Gavaskar, Kapil Dev
Designers: Queeny Dody, Sureily Goel, Rohit Bal, Manish Malhotra (Though I doubt if he will be a contestant)
Yesteryear actors: Padmini Kolhapure, Dimple Kapadia (I doubt), Poonam Dhillon, Anita Raaj, Amrita Singh (High chances)
Good choices. Poonam Dhillion and Amrita Singh are possible.
From directors- Karan Johar ??