We don't know how many selectees there are at this point, so I cannot say whether you will get a chance or not. However, it certainly won't be current in 2019 - so you have MONTHS to wait anyway - plenty of time to know more. Do not submit your DS260 at this point.
Why do you tell as don't submit the DS 260 at this point? KCC recommend that DS 260 should be submitted soon.