Ok there are some nice pet pvp abilities in Woltk that would gives some chance in pvp.Some of them are:
1=Bats -Sonic Blast- Emits a piercing shriek, inflicting Nature damage and stunning the target for 2 sec.
(80 Focus, Instant, 20 yd range, 1 min cooldown.)
2=Birds of Prey -Snatch- The bird of prey grabs the enemy's weapon with its talons, causing damage and disarming them for 6 sec.
(40 Focus, Instant, Melee Range, 1 min cooldown)
3=Crabs- Pin- Pins the target in place, and squeezes for damage over 6 sec.
(80 Focus, Channeled, Melee Range, 20 sec cooldown.)
4=Hyenas- Tendon Rip- Tears at an enemy's legs for damage and reducing movement speed by 50% for 6 sec.
(25 Focus, Next melee, 20 sec cooldown)
5=Nether Rays -Nether Shock -Instantly lashes an enemy for Shadow damage. Also interrupts spellcasting and prevents any spell in that school from being cast for 1 sec.
(30 Focus, Instant, 20 yd range, 30 sec cooldown)
6=Ravagers -Ravage -Violently attack an enemy for damage, stunning it for 2 sec.
(80 Focus, Instant, Melee Range, 1 min cooldown)
7=Spiders- Web -Encases the target in sticky webs, preventing movement for 4 sec.
(80 Focus, Instant, 20 yd range, 2 min cooldown)
So as you can see pet would have a significant role in Wotlk pvp.
I am thinking that in Wotlk we would have 2 sec stun every 1 min,3 sec stun every 45 sec, scater shot every 30 sec,traps every 30 sec...hmm better1