This build was developed for PvP and the problems the pvp environment encounters.
Frenzy with Smite - Fury generation and the chance on stun will open up burst opportunities. Chosen due to the need for a spammable fury generator that still deals damage and ramps up our damage over time and works well with both WotB and Whirlwind (Unconfirmed but may increase speed of damage dealt during WW)
Whirlwind with Hurricane - Damage Dealer skill that was chosen due to the AoE and movement speed choices taken later on. With the rune that allows WW to be used at movement speed, WotB makes WW faster incase enemies get away coupled with the fact leap stuns and slows allowing for free damage all over the target (Preferred combo: Frenzy stun -> WotB -> Leap stun -> WW, this allows a chain stun lock with increased damage and movement speed for WW while they are slowed or stunned)
Leap - with Death from Above - Utility skill that also doubles as a setup to a kill. It was hard to choose between Leap and charge both have their pros however leap seemed more reliable in most situations. Swapping this out for Furious charge or Ancient Spear would be good choices.
War Cry - with Invigorate - Survival skill that combos well with other choices made. This skill is still a variable, depending on the amount of heal and life gained this and the Inspiring Presence passive could be replaced. This was chosen due to the fact that in PvP it's undesirable to kill one person then die rinse repeat. This could prove useful for longevity in the arena however if its tested and proven otherwise can be replaced with more useful options such as Battle Rage.
Ignore Pain - with Ignorance is Bliss - Survival skill that if what was shown at Blizzcon is accurate, will be essential to Barb survivability in arena. As a melee character we need to get close to them to deal our damage however this gives them opportunity to burst us down, this with either Ignorance is Bliss or Contempt for Weakness (A waste against good players I would assume) ensures we cannot simply die from 3 or 4 players hitting us at once.
One does not simply 'kill' a barbarian
Wrath of the Berserker - with Insanity rune - Damage Dealer skill that is meant to be used with WW in this build. The insanity rune is there as this build lacks outright damage, if it takes some setting up a kill should be assured. The damage will stack with WW. If Frenzy needs to be used the attack speed from both skills would make for very quick DPS. This skill is only here to buff WW and damage in general - it could be replaced or have a different rune effect.
Superstition - Lack of resistances/mitigation from spells may make this necessary depending on incoming damage from casters. If this proves otherwise can be swapped out.
Inspiring Presence - This is here to buff War Cry, I don't think any barbarian would not use War cry off Cooldown to both refresh and gain the 30 Rage however the extra Regen may prove useful. Another one that requires testing to ascertain its value in pvp and barb builds in general.
Nerves of Steel - Chosen due to War cry again, testing required.
Lack of damage may prove a hindrance
Lack of peels without Ancient Spear
Prone to CC without passives
Mobility due to Leap and movement speed on WW and WotB
Survivability due to armour, life regen and Ignore pain
Burst damage with the proper set up
Stuns and slow with Leap and Frenzy
This build will probably vastly change when PvP has been tested