Well, you're getting one of them in this! And there are five Unown being posted. So hooray, on being sort of right.
As a public service announcement, are you an English-speaking user who eagerly awaits the release of Platinum and the use of the new Rotom Formes, yet are impatient about being unable to use them yet, and unable to navigate or unwilling to buy the Japanese version? Well, you're in luck! There are already Pokemon with a variety of different forms waiting for you!
Code:
Trait Rotom Unown
Shapes: 6 28
Weaknesses: 3 3
Ability: Levitate Levitate
But wait, there's more! Unown is also faster (in Trick Room), has been around in two more generations, is far more capable of espionage with its gray hue compared to attention-grabbing orange, and doesn't have to be caught at night a max of one time a game, or bred: you can catch as many as you wish, whenever you wish to! Give it a try on your team in place of Rotom, with the appropriate Hidden Power, until you can find a "suitable" replacement.
Also, hypothetical Rock Castform: