Looks like Warriors and DH tanks are getting Legendaries that give them 1 extra charge of anti magic and anti physical damage CD and recently in PTR Keg Smash was changed to a "recharge" CD which opens it up to the possibility of getting charges in the future.
I put 2 and 2 together and figured maybe the BrM Leggo that's coming up may give KS an extra charge.
If this happens, wouldn't it be undoubtedly the best legendary for the spec?