D/P, will there be a third game?

[Virtual Headache]

Do you think there will be another game, like there used to be Emerald, Crystal and Yellow?

And what would be different?

I think there will be a third game, probably called Pokémon Opal or something like that.
The trainer customisation idea from PBR could be used in this game, since it's in PBR but not in D/P.
I'd expect Giratina to be the Pokémon on the cartridge, because it would just fit there.

Well, what else could there be?
Probably some additional underground functions or another battle tower type thing?
I don't really have any other ideas than the ones mentioned above.

[Black Ice]

Is Obsidian a gemstone? If it is, then that'd be a really cool name for it, since Obsidian is dark, and I think Giratina would also fit on the box.

[SHTR]

POKEMON CUBIC ZIRCONIA *shot*

Seriously, there will most likely be a third game, as every New Gen has had one.

I think, as Dialga and Palkia are named after Diamond and Pearl, that the 3rd game will be Pokémon Girasol.