Well the cat is out the bag. BAF will acquire 2 Dassault Falcon 7X aircrafts on a 12-year dry lease contract. There was no official announcement of it but the media figured it out and defence confirmed the news (or rather Reynders did). Although someone made a mistake by saying it will be "wet-leases". (someone who probably doesn't know the difference).
The Embraers will be sold off.
So the white fleet will consist out of 3 planes, the A321 and the 2 Falcon 7x planes. Not sure what will happen with the A321 when that contract is up, could be that it won't be replaced since the ordered A330MRTT is also capable of being converted in a passenger/VIP plane (although that plane will be part of the NATO fleet rather than the BAF fleet).