AWD vs. RWD.
Maybe not for the M3 and M4 but it's not going to be surprising when the M5, M6 (and it's variants) get both a RWD/AWD or just an AWD option. While the F10 M5 does a pretty good job (0-60 in 3.7 seconds in some tests) at handling all that power, eventually BMW will have to move to an AWD setup when they start approaching 600HP+. When that time comes, the forum is going to get a hell of a lot interesting with the RWD vs. AWD debate.
MT vs. AT/DCT.
BMW says it's all about the rate at which MT sold. That pretty much means the MT will end on all models other than the M3/M4. Shouldn't come as a surprise to anyone.
Nothing to be said. Naturally aspirated engines are pretty much gone from the BMW lineup with the exception of the E82 1-Series with the N52(?).