According to GamesPressure, Obsidian CEO Feargus Urquhart acknowledged the existence of Pillars of Eternity II, confirming it was actively being worked on by the studio.

Based on this quote, it seems that Obsidian will return to crowdfunding for the second game.

Obviously, as you’ve probably guessed, we’re starting to move forward on [Pillars of] Eternity II. That is probably something that we want to look at [in terms of crowdfunding]. I think people felt like we delivered on our promise, and then that felt like we could go with Eternity II and people would support us again, because they trust us.

When asked about an official announcement, Feargus stated that it would be silly not to at least acknowledge it.

Obsidian is also working on Armored Warfare, Tyranny, and the Pathfinder card game as well. Feargus made note of a small group of people working on a “completely new” project too, but he wasn’t ready to talk more about that yet.

Pillars of Eternity was both a success on Kickstarter, and highly praised as a video game product on it’s release. Why mess with success? If Kickstarter seemed to be a good route for them, why not go for it? Best of luck to them on their future endeavors.