If Nokia were smart, they would make Android phones, like right now.
Seriously, who buys windows phones? And when you think about it, they're offering products that are new, offering it in a new OS. That's two dimensions they have to tackle. On the other side, if they went with android, they would offer new products but with an established OS. Android is mature while WP still has ALOT to improve, despite all the marketing, the money and r&d Microsoft has poured in. Coupled with the fact that they are SLUGGISH in their updates, completely eradicating previous OS versions etc.
So yeah, if Nokia doesn't want their own faith to be doomed soon, they will offer Android phones in the near future. It's not hard to do that as well