I don't want to wait until kingdom come for you to decide what you're doing.
until kingdom come
For a very long, indefinite amount of time; forever. Although we don't have to pay for medical care in this country, you'll sometimes be waiting until kingdom come to receive elective treatment.My wife and her sister will talk on the phone until kingdom come if nothing interrupts them!
till/until kingdom ˈcome
(old-fashioned) for a long time, for ever: You can dig here until kingdom come, but you will never find water.
The expression kingdom come in these two idioms means heaven or the next world.