I don't see IWD being in their wheelhouse. They like creating Origin characters, and IWD was not narrative heavy by any means. It was basically an overworld dungeon crawler with a complete set of custom made characters. That said, I think the engine they have developed from BG3 could lend itself quite well to an IWD3 but I simply don't see them having the interest due to the simplicity of the setting. Plus I think with the street cred they get from BG3, they could probably make any other D&D game and have their own fresh story untrammeled by expectations and nostalgia and have it do just fine.
They'd have to create an entirely new narrative for it from the ground up. Which might not be the worst thing in the world. It would give them the chance to create their own characters in a heavy narrative adventure in D&D.
