It will hinge on how ICAO view EASA. At the moment each state that is a signatory to the Chicago Convention has a seat on at the Assembly. Memebers of ICAO get to be on the Air Navigation Commission.
EASA want a seat on the ANC but ICAO will only entertain this if all the AN members sub-ordinate to EASA resign.
You already know the answer don't you?
But one day EASA will get a toe hold.
Sir George Cayley