http://www.bmwblog.com/2012/01/09/2012-detroit-auto-show-f30-bmw-3-series/
http://wot.motortrend.com/2012-detroit-new-2012-bmw-3-series-makes-us-debut-activehybrid-5-priced-154001.html
Both reports above suggest the M package will be available at launch.
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