The only new liongaurd charater I know of is Rani. I hope they add some more lion charaters. I watch the liongaurd just because it's part of the lionking, and to find extra information such as seeing the episode where Nala's dad was fineally revealed
Since Rani's the leader of a pride, we probably will see more lions. You can find information on the other new characters here: https://lionguard.fandom.com/wiki/Season_3