Yeah.... Before
If you're referring to "before this new printing", it won't make a difference. Just like with Keldeo v Rayquaza decks and others, they will leave the original set print & numbers on them. They only way they would become Standard-legal is if they printed the cards as black star promo cards. However, I highly doubt that they will do that since they are reprints with the difference being the artwork. Besides that, if they were going to make them standard legal, they would have also reprinted Manectric EX along with the Mega, and they would both have to be promos. Like I said though, they are reprints so that's exceedingly unlikely.