Current Branch = SCCM 1511 / ConfigMan 1511 / vNext!
SCCM 2016 is still up in the air. I have seen so much misinformation on this build / Service Pack / Update Release / etc. It only took a great presentation by Wally Mead for me to finally understand (Thanks Wally). Remember this is the next version after SCCM 2012 R2*
I have attached a screen shot below on where to access “Current Branch” in Microsoft’s Volume Licensing site.