Nah. Warcraft III had a few missions (some exclusive WC3 demo) that were cut in the final product (but are downloadable now in their website) where Thrall's forces landed near the Maelstrom. That's where Thrall met Sen'jin. His help, Thrall's help, and Sen'jin's death to murlocs are the reason why Darkspear Trolls are in the horde.Originally Posted by Lemming81
They had their own voicework for those missions too. But last i checked, the downloadable stuff no longer has this.
Vol'Jin is Sen'jin's son (What gave it away?), so he's pretty much the Darkspear Leader.
EDIT: Also if i remember correctly, that's when murlocs as a force made their debut. Wacky little bastards, new to the Warcraft universe, but apparently dangerous.