Save the kieki from dying Phal

[Fumi Lai]

Hi everyone,
I was heart broken when my neighbor overwatered my mini Phal while I was on holiday and I am sure there is now way I can save it now. There was two leaves and one went yellow and drop off last week and now the last one is starting to die (see attached pic)
But, on the spike there is something growing very strong and fast! I think the mother is trying to push a new keiki before dying. I have check the Phal and it has no root left. Can the spike stay alive without any leaves until the keiki grow bigger?
Can the spike acts as the root for the little keiki, so I can cut it from the spike and try to replant this tiny thing?
PLEASE experts from this forum. Help me to save the poor thing!!! Thank you!