If you are going to have it on the list you have to make it so people can actually join it.
Enrankus is an overflow realm for overcrowded Mega servers, it is open for transfers only, not new character creation.
You cant even transfer to it.
Yes you can. You can no longer transfer to Sulfuras, but you can transfer to Eranikus.
Please read the blue post here for more information.
did the lock it to transfers already? or just new toons.