So, I'm pretty sure that the "new Pokémon" listed at Serebii are either a fake, or they're simply extra forms of Rotom. They have a Rotom feel to me, and when I first caught him, I thought "I'm pretty sure there's more to him than this.."
Honestly, from all the stuff that's poppin up lately, they're overdoing Platinum. Just like the original DS -> DS Lite change, I feel like they popped out Diamond and Pearl where they didn't have everything finished that they would've liked to have done. I get the feeling they said "It's finished enough, we'll tye up some loose ends in the third version of the game.".
I say this because it ended so abruptly..