There isn’t currently a confirmed roadmap for upcoming updates.
However, you can stay up to date with news, teasers, and early previews by supporting the developer on Patreon or SubscribeStar, supporters there receive information sooner than the general public.
The developer occasionally shares hints about future content on Discord and Twitter, so those channels are also good places to follow for updates.
If you'd like your suggestions to be considered, you can submit them through the supporter platforms mentioned above. Suggestions posted here do not directly influence development decisions.
Thank you for your interest and for playing the game.