Its certainly Tampines. Its a known weakspot. Just puzzled with the post. NSP has done well there before.
It is obvious that Tampines is a smokescreen. There is no reason why Goh Meng Seng would want to contest in such a PAP stronghold.
Of all of the issues he has raised, housing and transport are the two strongest.
Why would he attack transport if Raymond Lim was in Bedok, another PAP stronghold?
Somewhat coincidentally, there is a GRC with a MOS for housing AND a MOS for transport. This GRC has an extremely faourable demographiic. My hypothesis is that this GRC is his true target.