Hi-lows-note spotted a new patent from Panasonic. It describes the optical construction of a new 18mm f/4.0 lens. This is designed to cover the APS-C area. It’s unclear if this means the lens is for L-mount or if this is still designed for MFT.
Some time ago Panasonic stated they have no interest in making APS-C lenses for L-mount because they already are heavily invested in MFT (Source: L-rumors.com).