It may be tough. Currently the MM systems is bloated with miles from the pre BIS days. AA's IT was not that good until recently. They may not have a way to look at lifetime BIS miles pre-the changeover. Lots of 5+MM'rs out there. Maybe even pudding man would get it if they used only MM miles to AAward it.
And if they only started counting qualifications toward a 3MM and up goal after Dec 2011 it would only elict a collective yawn