It's meant for 2-6 year olds so I really don't have much hope in it.
So's My Little Pony, but that didn't stop it from being really popular with adults.
I'm cautiously optimistic about this one. The latest press release
has a bit more info that sounds promising.
The show will also include special appearances by Mufasa, Timon, Pumbaa, Rafiki, Zazu and Kion’s older sister, Kiara, the future Queen of the Pride Lands. (!)
Consultants from the Disney’s Animal Kingdom theme park at the Walt Disney World Resort in Orlando, Florida will serve as advisors on The Lion Guard stories, while author and Swahili expert, Sarah Mirza, will serve as language and cultural advisor.
So, it's in continuity with the first two movies (and presumably not the Timon and Pumbaa tv series or TLK 1-1/2, which is good), and it sounds like they're taking the animals and African culture seriously. It could be horrible, of course, but I'm eager to give it a shot.