Vitani is the tertiary antagonist of the Disney sequel, The Lion King II: Simba's Pride. She has no real role in the villain wars, aside from brief cameos in some of Zira's battles.
Disney Vs Non-Disney Villains War - Part Two
Vitani is briefly featured in the Battle of the Pride Lands, watching in glee, as Tublat, one of Zira's newest allies, lay waste to Slithe's lizard army, annhilating many of them. Her exact fate remains unknown, since she doesn't make another appearance in the first series.
Disney Villains War
Vitani makes cameo appearances in Zira's battles against Percival C. McLeach and Alameda Slim, both of which she appears alongside Zira. Her whereabouts, after Zira's demise, remain currently unknown.