Thanks to /u/Natzore on the Nintendo Switch Reddit for pointing this out and Nintendo Life for making a video & article about it.
From Nintendo Life:
So while there's no need for Chibi Robo to burn forever until the end of time, we may hear more from Nintendo sooner rather than later, as many originally predicted.
From Nintendo Life:
People who look for consistency and patterns in Nintendo's thinking often come up with absolutely nothing beyond a Mii in a hot dog costume, but Reddit user Natzore has discovered something of actual worth.
Looking through the past schedules for Nintendo Direct presentations, it seems Nintendo has been quick in the past to follow up a Nintendo Direct Mini with a full-fat Nintendo Direct, rather than just letting them sit as they are.
Take a look over the table below from the Nintendo Switch subreddit; it details all the instances of this pattern to date.
Of course, Nintendo have often bucked even their own trends, so this is certainly not hard evidence, however the strange absence of larger games such as Bayonetta 3, Yoshi, Wolfenstein II: The New Colossus, and Fire Emblem in yesterday's presentation does seem unusual.
So while there's no need for Chibi Robo to burn forever until the end of time, we may hear more from Nintendo sooner rather than later, as many originally predicted.