Not sure if being "best in the series" means too much. For your last sentence for the bolded, people will mention Pokemon Sw/Sh, since it will likely set itself up to be the third or second best-selling games in the series.
As for your last point, its kinda strange. Metroid Samus Returns was well-received by critics and, outside of a few fans, I've heard mostly good things about it.
"Best in the series" means excellent word of mouth which in turn is the best long term sales driver there is. I am talking about word of mouth well beyond the limits of the internet. Which ties into the reception of Samus Returns, because the good things said about that game were contained within an internet bubble.