BMW is planning on doing an M3 with the long base as well. It will be called F30 BMW M3L. To cope with the extra 300 lbs weight (for a total of 4500 lbs), BMW is planning on adding a third turbocharger on top of the planned two turbochargers that the F30 M3 3.0 Liter i6 will have. Juicebox is already working on a tune for the triple charged long-base M3.
Good times. I love BMW because now they are only great to get a good laugh.