Nokia doesn't belong to Microsoft. Nokia's phone division belongs to Microsoft. I imagine the actual Nokia company will begin selling Android phones in a couple of years again, too, so you can't call these "Nokia phones". They are Microsoft phones now.
Nokia can't market mobile phones under the Nokia brand until 2016.
Also, the company Nokia doesn't own a phone division anymore, they'll have to build one, if not from scratch, then pretty close to. That mean they don't have any competitive advantage over pretty much any other company in a similar situation.
Never mind that they really, really struggled to compete in the smartphone market - that's why they offloaded the mobile phone division in the first place.
In other words, I doubt very much that we will see consumer mobile phones from the not-Microsoft-owned bits of Nokia.
I wouldn't be surprised if they licensed the name out to some up and coming Chinese corporation with a difficult for English speakers to pronounce name.
If that's what it takes for you to buy it, I'm sure the Microsoft sales team is willing to go with it. It's your fantasy. They are your anything. Just sign here...
This doesn't fly without MS at this point. Even if all the work was done prior to the buyout, that this comes to market when the Surface Mini keeps getting held back means there's MS all over it. Just look at the UI and say, "There's no strategy."
We can debate if it's a good strategy, but someone has obviously put time into considering placement and design of this product.