A
teaser for
Return of the Roar stated Janja's clan are descendants from Shenzi, Banzai, and Ed. However, you can spin this anyway you want. My head canon is that because there were multiple hyenas gathered at Pride Rock during Scar's reign, there's a high chance that the other hyenas (that are not the main three) mated and gave birth to new hyenas. This brought about Janga's clan who decided to stay in the Outlands.
In
The Lion King II, Nuka states that the hyenas ran off. With
The Lion Guard involved, he could also be referring to Janga's clan, too. In the end, I believe the main three hyenas, after eating Scar's corpse, later ran away into permanent banishment. So, they're still alive in my view.
[quote="gothprincesskiara"]Janja said they died[/quote]
What episode did he state that? I don't think the hyenas were burnt up in the fire because it started raining shortly after. It's possible that they did, and there was a time gap between Scar's death and the rainfall since film editing can be deceptive.