Their IPs are steadily losing power, particularly after Nuts & Bolts. It's clear that Microsoft acknowledges they have some capacity to move units though, with Conker's cameo at the end of that trailer (I forget the name of the game... it was at e3...)
But I wouldn't be surprised if Banjo/Conker/Perfect Dark were held at attainable values (at least, on a corporate scale) along with some of Rare's other ignored properties (Jetpac, Battletoads, Jet Force Gemini, Kameo). I would assume that, at the present time, the only of their properties that has significant value is Killer Instinct. I don't think there's a ghost of a chance Microsoft would ever let that go.
But I wouldn't be surprised if Banjo/Conker/Perfect Dark were held at attainable values (at least, on a corporate scale) along with some of Rare's other ignored properties (Jetpac, Battletoads, Jet Force Gemini, Kameo). I would assume that, at the present time, the only of their properties that has significant value is Killer Instinct. I don't think there's a ghost of a chance Microsoft would ever let that go.