Not happening. The whole point of the 'Legacy Mark' is to identify a character that was made in 1.0, regardless of how far you actually got in that game (my level 1 1.0 alt that I never levelled beyond the initial starting cutscene has the Legacy Mark, as does my my 'main' 1.0 character). And, as Yoshi himself said way back during the downtime between 1.0's shutdown and ARR's testing period, he promised 1.0 players that they would "add some way of differentiating 1.0 characters from new characters in the new game" (paraphrased), and the Legacy Mark is that.

I'm sorry to say, but unlike the White Ravens which were just a bonus for completing the short term 1.0 storyline (and thus very few 1.0 players ever actually got them), much much more have the Legacy Mark, so that has about as much chance of seeing 1.0 restored I'm afraid.