Honestly, it’s very believable that Disney would be talking about a follow-up to The Nightmare Before Christmas.
It’s a miracle The Nightmare Before Christmas has lasted this long on its own.
They’ve gotten so much success from live-action (and whatever you want to call The Lion King) movies and sequels, with multiple of both formats coming later in 2019.
The studio must be going through every successful film in the vault at this point.