Ressing Garrosh as Scourge lord Garrosh would be a start, he deserves redemption since even Blizz admitted they faqed him up. Especially when he was in the right. As long as they keep his character intact and not turned into another woos like Thrall.
Not to mention forsaken could use a new leader and if timeskip will happen, we can assume the world's gonna be faqed up, so we'll need a cleanup crew..