Which oldies to go next?

Who's next among the biggies and oldies that will follow Boon Heng and Jayakumar? My guess, the only last two biggies will follow suit. Yes there will be a new team this time. No more oldies left other than Charles Chong.

Even then, he too may be taking a break from Joo Chiat after the election. So I am seeing a younger party with Hsien Loong as the oldest left in the team.

Just my take.