Drysc has posted on the forums to clear up any questions about what's happening with PvP gear in Season 4. And while the rumors that Naxx gear was leaving the game marked the first instance of Blizzard removing content, here's the second: season one gear will no longer be available during Season 4. Not a big loss, since there is now other good PvP gear floating around, but a loss nonetheless.
Season 2 gear, as expected, will move to honor, with no ratings requirements. And Season 3 gear will be released according to the ratings requirements and rules set out the other day.
Got all that? So start saving that honor and/or practicing for the good ratings now. You have to think that, with all of this news solidified from Blizzard about Season 4, the start must surely be right around the corner. But of course this is Blizzard we're dealing with -- we won't know when it's coming until it's actually here.