We all fell in love with Zappyboi in the BFA cinematic for his sick lightning move, but Blizz didn't put him anywhere in the questing or war campaign up until the Saurfang bit where he... shows up out of nowhere in the middle of redridge, no explanation for who he is or how he got there ingame.
What do you hope Blizz does with him next?
Personally, I'd have Zekhan work on recruiting from other troll tribes to bolster the Horde forces that oppose Sylvanas, but also to stand up to fringe Alliance forces in EK.
Ex: Alliance wins the Battle for Stromgarde and start wiping out both the Horde and Witherbark / Ogre forces in Arathi, so Zekhan and the Revantusk evacuate everyone to Hammerfall and then into the mountains to get to the Revantusk in hinterlands.