There's a lot going on in Waterdeep, so I wouldn't be a bit surprised if WOTC told Larian: "Stay away from Waterdeep, that's our playground."
I doubt it, there isn't a novel line anymore A-side from 1 Drizzt novel per year and they've already done Waterdeep in APs, and have moved on.
The only reason they picked it was BG 1 & 2, the nostolgia factor.
