remain to be seen

have seen one's day

Of a person, thing, idea, etc., to be at the point in a life cycle or career of no longer being useful or effective; to be worn-out.

have seen one's last gum tree

Of a person, on the edge of death.

have seen this movie

To have experienced a situation which is the same as or similar to the current situation, especially with a sense of the unpleasantness or tiresomeness of the recurring situation.

wouldn't be seen dead

To find incredibly horrifying; embarrassing or otherwise entirely unsuitable for oneself.