Usually the first two months of the year are full of announcements. CES and CP+ (although canceled) are good timings for new announcements. But as noted by SAR a couple of companies had no nearly no announcements at all. All we got so far from the Lecia-Sigma-Panasonic L-mount group is the updated Panasonic S lens roadmap.
Here is the list of profucts announced by all camera companies:
Sony (1 product announced):
Sony 20mm F1.8G
Leica (1 product announced):
Leica M10 Monochrom
Panasonic (0 products announced):
no product announced (a part of a new L-mount lens roadmap).