I personally hope they don't add in some super old unique OP items (like staff of magi) but instead new ones - I don't at all mind unique or old (in game universe sense), just as long as it's not the be all end all of magic items that was used by every single hero ever before you. The idea that they're mind flayer related seems nice.
A good example of this is Keening from the elder scrolls universe.. the nerevarine dies if he touches it without wraithguard and is really really good while everyone in skyrim seems to handle it just fine and it sucks. Let that one legendary weapon that's lost stay a legendary lost weapon and go make new ones instead!
