As you may have noticed, there was an unsupported experimental plugin named Paper2D already present in the 4.0 launch.
I’m very happy to announce that we’re going to be taking it from experimental to a supported engine feature over time. The goal of Paper2D is first-class support for making 2D and hybrid 2D/3D games in UE4.
Anyone who is interested will be able to follow along with the live Perforce->GitHub mirroring, and you can see the current Paper2D Trello Board here (tasks / roadmap / etc…).
As a disclaimer, anything listed on the roadmap may not actually make it into the engine as planned today; we may run into complications that push out a feature, or we may have reason to stop working on it altogether. Items in our backlog may never see the light of day either, as they are simply ideas we’ve discussed but haven’t yet figured out if or how they would best fit into the engine. While we intend for most items on the roadmap to end up surfacing as estimated, we want to make it clear that there is no guarantee of a feature being added to the engine even if it’s currently listed.
There is a quick start guide / initial docs thread on the forum which covers more about what is considered fully supported, available as early access, or totally experimental as of the 4.3 release.