Yes, the point of doing the extra work for the Linux version (writing stuff to replace the middleware incorrectly assumed to exist) and updating it to the EE version was so the engine would be up to date and there would be the possibility to support Linux at release for future games.
Nothing has been announced about the 2 new RPGs in development, though (except that they are using the same engine and gameplay mechanics, with updates, of course), including supported platforms.

The plan is to release the Linux version the same time as PC (November-ish).