Over the weekend this received a lot of attention. And based on the rationality of this doesn't matched the already confirmed names of Avacyn Restored's pre-release and buy a box card, even though the release and game day cards easily fall under "promo", was quickly discarded as fake. But what if it's not. What if WotC understands that it has to properly address what's wrong with legacy. FoW isn't on the RL I do understand that, which is why the discussion of it being reprinted is very common as it obviously feels mythic, which is why the uncommon fetches a $50+ price tag. But FoW can't be reprinted, because it's just to good, dramatically unbalancing blue for the next 2 years is the only way to properly justify a reprint in a non promotional print. So ideally we would need a "fixed" version, an almost neutered version to help usher in the next generation of legacy players, if WotC does in fact want to preserve the format. Id go as far as to say that this would ultimately allow WotC to ban FoW, maintaining a necessary evil that must exist as there are way to many combo decks that would easily be a repeat of combo winter times one thousand.
The argument "WotC learned it's mistake from misstep" argument is heavily flawed. Now the source really didn't state how they came into contact with this information it could very well be a poor translation. Now what if it read like this:
You may pay 2 life and exile a blue card from your hand rather than pay Asphyxiating Blast's mana cost. Counter target spell with converted mana cost 3 or less.
Now from a standard players view point this is a 2 for 1 for the first couple of turns of play and as the game progresses it becomes a narrow cancel. It's good, feels mythic, yet isn't overpowered. But it would still be quickly banned in modern, that list isn't long enough yet and is dictated by twitter.