In theory or in practice? In theory, players could start coming back and playing or development could resume, and one would cause the other to happen. In practice, I don't see either side wanting to take the first step, both just pointing at the other as the reason for their side to not do it. Since resuming development required taking resources from other parts of the project that still need them, they won't be moved to a server that displays such low actual interest (players saying they "would play if" aren't really going to be taken into the equation), and players on the other hand won't start playing just in the hopes that if they come back there will be development happening, which might never happen if the Administration sticks to the plan of not putting more effort into an expansion that just won't give a good RoI, even if populated, with all the extra coding complications that it introduced to the game.