Good to see Hyrule Temple is back, it's one of my favourite stages in Melee. I hope we'll see a lot of other stages back as well. They could even bring all of them back but that would be asking for too much, but I would like it if they did. :p
He's almost definitely in the game as the Twilight Princess team send his character model to Sakurai. But he will probably be unlockable again so I don't expect him on the site before the game's released.
I believe that little ledge next to the lowest platform isn't in Melee either, that's probably a picture of an old beta version of that stage.