Absolutely. I'm very surprised we havn't seen this already. However Nintendo is also trying to move away from the model of dropping prices on games. So you'll find for the most part Nintendo games have remained at a static price point since they launched. Not doing a 'Platinum Sellers' - which is usually half the original price could be part of that decision.
Still it'd be nice to have some kind of Platinum brand for outstanding 3rd party games like Zack & Wiki, RE4, Okami & Boom Blox (and many others) that people shouldn't miss.
What I don't want is any million seller getting 'Platinum' cause that would further help sales of crapfests like Party Games.