They haven’t said they intend to stop making D&D games. And every D&D crpg in the last 20-odd years (since Torment, I think) has been set in the Forgotten Realms. So it seems highly likely that future games will be loosely related to BG, just without that specific title.
I would love to see them bring back some of the weird old settings, like Dark Sun, Spelljammer, or even Dragonlance. But I’m not holding my breath.