This third game is nothing new for the series. Pokémon Yellow was released after Pokémon Red and Blue, Pokémon Crystal was released after Pokémon Gold and Sliver, and Pokémon Emerald was released after Pokémon Ruby and Sapphire.
Currently Nintendo World Report is seeking further details on the game and will be posting an update to the story later today.
Do these third versions stilll sell? Haven't Pokemon fans figured this scam out yet? Maybe there's a large chunk of people who intentionally wait for the third version and don't buy the original and another chunk that only buy the original. But the two groups are large enough that it appears that people are buying both.
Nah, I'm giving people too much credit there. ;)
The rules of gaming are simple. Never buy a Pokemon or Metal Gear Solid game on day one because a better version will ALWAYS come out within a year.
It's probably just me, but it's a shame that Crystal was used for G/S as it would go better along side Diamond and Pearl than Platinum.
It looks like the major changes relate to the Legendary pokemon. Giratina gets a new form.
http://archives.bulbagarden.net/w/upload/1/18/Giratina-OriginForm.png
Shut up Ian.