2.6 million is not their least selling, last 2 fire emblem for example sold much less, also others....
NPC sold really good for rereleased games with no significant changes, and they are still selling....
i don't think it's the last, if it sells 1m or more it won't be the last for sure
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^