Pikmin is the pet project of Nintendo's idea golden goose, was represented heavily in a major multi-franchise game and had both of its titles re-released for the Wii in the last few years. Colosseum/XD cannot claim any of that.
They could announce Orre 3: Return to Dark and Moody tomorrow and this would all be rendered moot, but The fact that nothing even remotely related to Orre has since been seen or heard from in the slightest is not indicative of a side series they intend to continue.
And even if it were a similarly-designed RPG title, it would purposely be as watered down as the Orre titles were. They've said over and over that we will never see a fully-featured game, comparable to a core title, for a console.