Nope, can't give any dates on certain releases. After the main tools for the sandbox are complete (all planned functions are in) I'll concentrate on content, after that I'll start looking into adding the modules. Sure, requests are welcome! I'll add it to the list.
Other things, mainly construction on Kenney Land which was recently renamed to Pixeland. It's a hub for local game developers to work on their content and share ideas and resources, it's going global next.