Now that recent video and pics have shown us what PB has been up to for the last couple years we are beginning to see the extent of some careful planning that has gone into bringing this pin back, streamlined and improved.
Having said that, I wouldn't bet against them already having a plan for the beacons and who knows, maybe even strobes.
They did say during the initial podcast reveal that there may be optional factory installed upgrades as well as user installed upgrades to come, but didn't want to introduce any more complexity in the manufacturing process early in the SV run.
We did hear casually mentioned in the podcast also that there are already output leads for a shaker motor in the SV's, yet nothing has been mentioned as to when they'll make their shaker's available.
My guess is we will see the beacons and other accessories introduced closer to when they begin promoting the LV, which will probably have all the extras included, as well as other goodies unique to the LV model.