Expression for things in the future

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi All,

Is there a smart word for the below expression?

We will have to wait for that a very long time.
We don’t know if it happens and if yes we don’t know when.

The German expression for it is das ist noch Zukunftsmusik

2

A similar English expression that comes to mind is:

(Only) the future will tell.

3

Only time will tell (heard in a song of SAGA)

Michael

4

Exactly, Michael, that’s how the old saying really goes.