In an interview with Brandon Adler at Gamescom, he revealed that Obsidian are considering additional genres for future Pillars of Eternity games.

Both Pillars games are top-down, isometric RPGs, but according to Adler, ambition at the studio goes further than that.

 

(In regards to) the franchise itself, there’s a lot of different things we want to do with the IP. And it’s not even just isometric games. We really want to support the IP long term in a lot of different ways.

Adler even got specific in the types of games they’re thinking about.

I know Josh was talking about pitching a Final Fantasy tactics type game using the Pillars universe. I know there’s (also) a lot of people at the studio who want to do something in the vein of an Elder Scrolls. So there’s a lot of things we’re kind of exploring for that.

That’s certainly got our mouths watering just thinking about it. The potential is certainly there.

As for any plans regarding Pillars of Eternity 3, Adler couldn’t be drawn into specifics, but he did say…

For the third game, we’re still talking about that and seeing what makes sense right now.

Great to hear they’re talking about it at least!

(Source)