I'm creating this topic to answer some common questions. It is completely barebones for now. I'll update it with more information when that becomes available.
1. I've using the same account name on Elysium as I used on Nostalrius. What will happen?
Elysium staff already mentioned that this will not be an issue. You create a new Elysium account and transfer your old Nostalrius account into that new Elysium account.
2. I've forgotten my password for my old Nostalrius account.
If you have a valid email address associated with your account, no need to worry. You can use your account name and email address to get your token.
3. I've forgotten my account name.
If you didn't delete your vanilla WoW installation, check inside the WTF/Account folder to see all account names you've ever used. You will also find character names under each account. If you did delete the vanilla client and have no recollection of what the account names were, then you are out of luck. We cannot assist you.
4. I went little crazy during the last days and got banned. Will I get a second chance?
That depends on the reason why you were banned. Temporary bans for spamming will be lifted and you can get back. Bans for botting, exploits, hacking - these will remain in place. If you were banned before the closure announcement, you will remain banned. Only exception to this are cases that were being reviewed at that time - they might get a new review.
5. Can I get a ban review?
No. As per Daemon's last announcement, Nostalrius is not reviewing any bans at this point. Nostalrius bans remain and Elysium cannot unban them either.
6. Can I get my deleted character back?
No, we are not not doing any character restorations.
7. I don't remember my account name!
There is nothing we can do to assist you. Please try to remember it. No amount of screenshots of your characters will change the fact that we no longer have access to the DB.