In the comments you'll find Eric's answer to your question.
There won't come any further legacies.
Next week we will get the patch, he told as well.
Posted by: Eric-ND on 02-19-2013
We aren’t adding any new Legacy levels to the game.
So it is nothing or new levels, but no new legacies.
Well I had to come take a look for myself, I'm starting to get more then one message from friend's saying I was mentioned on the forumns. Normally it's drama, but this was actually an awesome thing to see.
Playing a normal match and running into something so strikingly different will def'ly catch your eye. I'm guessing it was or is something ND is working on bringing back b/c that Level 90 comes from the old Level card that was released before the Summer Beta, others have listed the picture a few pages before this.
If anyone remembers when ND gave us the Anniversary Shirts in UC2 and several of us ended up playing with the Official ND Red Paw, of course which was a mistake by developers for mixing the codes and making them live. I'm guessing it's something along those lines.
Whatever it was, it def'ly was cool to see, even if it wasn't supposed to be there or may never be a live level that we get to play.