Are WoA Devs Working on a New Game?

What do you think these screenshots and images shared on Instagram are all about?

I think that WoA devs might be working on a flight sim game or something else that is going to be really cool! (Not just WoA 2.0)

Kuba_flyboy: https://www.instagram.com/kuba_flyboy/
Flyboys: https://www.flyboys.games/