I actually haven't ever been to Singapore (I did stop at Changi once on my way to Australia a few years ago, but only for a couple hours). I will see if I can manage a couple hours sleep on the way over (I'm just under 2M tall so not sure I'm going to fit great in the seats for sleeping on the A350 unless I can get bulkhead which currently show not available - probably blocked I assume this far out) in which case I should be fine to wander around for a few hours in the night scenery.

Question - can I go airside for a hotel so as to not have to get up too early for the 9AM flight?