Arma 3 Development Roadmap - Fourth Frame

[Tommygun9504 10]

My apologies if there's already a thread for this, and please direct me to it if there is, since I haven't been able to find one.

You'll notice that in the Arma 3 SPOTREPs, such as this one, there's a diagram of the development roadmap at the bottom.

First and second frames are the Alpha and Beta, since retired, and the third one is the current release.

What intrigues me is the fourth frame, which (to someone like me who loves speculating) looks like it could signal an expansion or some other form of DLC. Possibly it's Zeus, but what if it's not?

What do you think?