Kattani would like to see Darkspear at the forefront of a resurgence of Troll power. Seeing them pave the way to rebuild and unite the tribes, and make the world safe for them again. Erasing any possible evidence that night elves are related to them, while reclaiming ancient lands from even older enemies. (Eversong going back to the Amani, arathi going back to the whitherbark, zul drak being returned to frost trolls, darkshore in conplete control of the shatterspear,)
She would seek peace between the tribes to prevent the infighting that has wrecked their entire civilization. And she would wage an all out encompassing war against the Naga for what they did to Sen’jin (though with nazjatar I don’t know how powerful the Naga are anymore).
After that she would seek a loose alliance with the horde for trade and mutual living. And allow the alliance to operate, if they stay out of the way. There is a lot of bad blood between humans and trolls After all. And having one of your heroes be literally named for the process of WANTONLY KILLING TROLLS FOR BEING TROLLS as well as developing a “sacred” weapon to commemorate it keeps them firmly on the kill on sight list.