Didn't Bozja require the 24-man from SB or something?

There have been tie-ins of old content to unlock new relics before. This is nothing new. And just like before, we had ample time to do it. At least with Hildabrand, you could probably skip all of the CS and solo (or duo) all of the instances unsync'd and complete it under 45 minutes. Possibly less.

The 24-man pre-req for some other relic... that took hours simply because you can't unsync the content and the queues were long.