January through March is generally the end of the fiscal year, which often means mass layoffs. Especially in the tech and gaming industries that are notoriously volatile. While some studios have been insulated from major losses due to overwhelming success, most major publishers have dropped at least some staff.
In some cases this doesn't mean much to consumers, but for the studios with the largest cuts this can mean that some games in progress won't see the light of day. Many of these projects are unnamed and unannounced, which means they may be reborn in a new form somewhere down the line. But for now, all of these games are dead on arrival.
