1st Week = 1-1.5 million
15 weeks = 4.5 million
Lifetime = 8 million
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Last year, New Super Mario Bros was at the same preorder level that Donkey Kong is at now. When the price cut happened, Mario's preorders doubled and then tripled on a weekly basis. It eventually came out with a first week tally of 2.29 million, mainly thanks to a huge first week in Japan.
This leads me to believe that Donkey Kong may follow a similar path. If a price cut happens, I expect it to open higher. If not, then it might open around 1 million.
For the first fifteen weeks I expect this to be one of the top sellers for Nintendo, with at least 500k/wk for the 6 weeks through the holidays. After that, it will slow down to a pace of maybe 150k/wk. At the end of 15 weeks it should be at 4 to 5 million.
For the rest of the year, I think the legs will hold up well at about 80-100,000/week, totaling to around 8 million at the end of 52 weeks from it's release. From there it may inch up further to 9 or 10 million.