you are all wrong. the third game that'll accompany black and white will be purloin macguffin.
/thread
the staple of pokemon yellow was pikachu.
the staple of pokemon platinum was giratina.
the staple of pokemon emerald was rayquaza
the staple of pokemon crystal was suicune.
what does this have in common? every 3rd game to accompany 2 new gen titles had the color of whatever staple pokemon they had. this is also the same for most of the other games.
meaning whatever pokemon is going to be on the front of the case is going to determine the name of the game.
as all of the 5th generation pokemon have been established, it's safe to assume that some legendary we already know about will be on the front of the box.
now, think of all of the 5th gen legendaries. as i don't know which are legendaries and which aren't, for the most part, i won't be listing them here.
if you really think the name of the 3rd 5th gen title will be gray, then go find a gray 5th gen legendary.