So much speculation here but most don't know how it works.
One, as good as Lily Neo is, she is just a normal MP and not a political appointment holder. She can't be considered a heavyweight in Tanjong Pagar. Chan Chun Sing will helm that role in LKY's demise.
Two, it's not feasible to send an existing heavyweight like Lim Hng Kiang, albeit nearing retirement age, to lead the crack squad to Aljunied. It's poor form and what message are you conveying to Singaporeans? Vote for us, if not you'll lose your important Trade & Industry Minister. Really?
Three, George Yeo is done with politics. He has nothing left to prove, and he has better work life balance under the Kerry Group. He may run for President one day, but back into the fold as a PAP running candidate? Extremely unlikely.
Last, WP will almost certainly break up the Aljunied A team and send a mix of experienced and new blood to contest East Coast GRC. Whether it'll be Low Thia Kiang remains to be seen, but it should be either him or Sylvia Lim to lead the other team.
Sent from my phone using GAGT