Shaymin's new forms

[PokeYurt]

If Shaymin were to get new forms, is it possible that these new forms of Shaymin will be based on other Types?

 

[colours]

It's kinda hard to imagine Shaymin getting any other form other than its Sky form (which I'm a massive fan of btw!!). What other form(s) do you have in mind? Do you think it's necessary for it to have additional forms?