So far, there's no news for a new Lion King movie, even though I wish there was. Hopefully when TLK's 15th anniversary arrives, we'll get something from Disney in regards to TLK. I'm still waiting for them to release the Blu-Ray discs. lol.
Not to be a blood boiler, but I doubt anything new will be coming from Disney regarding TLK. They usually don't extend beyond two sequels even if they did a good job with them. Plus I heard that Disney is done with Direct-to-Video movies, which obviously hurts the chances of a fourth film.
Yeah, pretty much like everyone else said, there's no official word yet on a new TLK. We're just waiting on the BluRay releases of the movies to get our next TLK fix! lol. ^^ Or at least, I am. hehe.