The asserted "original dragon" comprised of Reshiram, Zekrom, and Kyurem could very well be introduced in Gen VI as its own species and as Pokemon #650 in the National Pokedex. --- [Este mensaje fue borrado al deseo del dueno]
There's also the fact that Unown got extra forms a generation after it was introduced. Could happen to Kyurem... --- Creator of Jay's Journey (see quote!) "It's not ten years old! Therefore, it sucks!" - Nostalgia whores everywhere
The Regis weren't a main game legendary, so Regigigas being released was just random.
There is a 0% chance of Black and White Kyurem ever happening.
Remember what happened the last time someone declared a %0 percent chance of something happening? --- http://backloggery.com/SolarCrimson - My Backloggery The official Okuninushi of the Shin Megami Tensei IV board.