Looks like a new tail light treatment is definitely coming. The existing E93 (both regular and M3 variants) have red tail lights with a white strip at the bottom which encases an amber bulb for directional signal. These spy shots reveal an amber lens up top which encases what appears to be LED bulbs.
Very similar to what they did with the E46 'vert back in the 2004 model year... migrated to LED lights.
Past: 2008 M3 (E93) naturally aspirated V8 realness!
Past: 2012 740Li (F02) M-Sport (European Delivery)
Present: 2016 750i (G12) M-Sport