I think they will leave it that way now and if the card is dead because no one wants it anymore, the boss will be changed.
This is just ignorant of what is happening if you want to challenge it then please do it as an attack mission.
So people can choose what they want to play but you prevent players from getting advertised content from the expansion what they paid for!!!
Just because nothing is changed and you remain stubborn.
Then change the achievements so that the meta achievement is no longer necessary