Broadway performers and
The Lion King alumni Heather Headley (who originated the role of adult Nala) and Christopher Jackson (original member of the ensemble cast, later took over the role of Simba; actually voiced the giant gorilla Shujaa on
The Lion Guard) are voicing Makini's parents in an episode down the road and will have a duet together:
https://deadline.com/2018/09/the-lion-g ... 202455784/As for season 3 being the ending, it hasn't been straight-up confirmed by Disney in some official news story or press release, but comments from Ford Riley and some of the other show runners like Christopher Willis (who does the orchestral scoring) and Kevin Schon on social media and publicized person-to-person communications indicate as much.
There was Ford Riley who initially posted a photo of him finishing the script for the season finale of season 3, writing about it in a pretty reflective tone:
https://scontent.fbed1-1.fna.fbcdn.net/ ... e=5CDA2A73Additionally, someone sent a letter/petition to him in early 2018 and he actually wrote back, saying "I will voice your sentiment that "The Lion Guard" deserves a 4th season to my colleagues at Disney Junior. But, just so you know, even if Season 3 is the final season of the series, I feel that creatively the last episode of Season 3 would make for a satisfying conclusion to the series. But I can't give you any spoilers!" You can see the full text here:
https://lionguard.fandom.com/wiki/Thread:72121 Then you had another writer posting a similar thing on the season 3 progress, speaking about the season finale:
https://scontent.fbed1-1.fna.fbcdn.net/ ... e=5D228E2C Christopher Willis had his own thoughts on it:
http://i.imgur.com/hrcvaTd.jpg and Kevin Schon (Timon) has said in conversations with someone on this forum that Season 3 is written as a series ending that will tie together all the story threads and lead into the back half of
Simba's Pride.