You wait!

you (just) wait (and see)

You will see that what I have told you or predicted will turn out to be true eventually. I know you're going to get that job, you just wait! You wait! I bet Susan has some wonderful surprise lined up for your birthday. I'm going to blow everyone out of the water with my performance, you just wait and see!
See also: wait
Farlex Dictionary of Idioms.

You (just) wait (and see)!

 and Just (you) wait (and see)!
Inf. Wait and see what will happen.; If you wait, you will see that what I predict will be true. John: You'll get what you deserve! Just you wait! Jane: Mind your own business. Bill: Things will get better. You just wait and see! Sue: Sure, but when?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • you (just) wait (and see)
  • you wait
  • Just (you) wait (and see)!
  • cool one's heels, to
  • wait out
  • wait a second
  • on a/the wait list
  • on the table
  • be on the table
  • take (something) off the table