I think this game bombing is a good thing, because all indications are it is a crap game (e.g. 5/6/6/6 score in Famitsu, which is really bad.) and it shows Japanese consumers won't throw their money at any old game with a famous character on it. That's nice to see. Also, it's the fourth or fifth Doraemon game on the 3DS (brand fatigue) and it's published by Furyu, which doesn't have the best reputation for quality.
But I agree with you about the brand overexposure
and looks like they recycled the same graphic engine for the previous title published last year