Receivership would mean the loss of the AOC which would render the whole exercise futile.
If that's indeed correct (anyone who can accurately comment on this ???), then any new entity won't be up and running before 2021. This may not be a bad thing as the domestic market will be much closer to "normal" by then and a new entrant will have some traction.
The above dates would imply that the 16th June would be the real date the administrators will have to pull the pin if the bidding complexity delays the outcome. Why would they waste 2 weeks (to 30th June) of aircraft lease payments when creditors could get their hands on those funds based on a known outcome as at the 16th June.