Not great. They were right about Pokemon Mystery Dungeon, but most of their "insider knowledge" really seems like it is just following other leakers and, more often then that even, following known intentions verbally expressed by video game designers (ex/ predicting FE6 will get a remake, a thing the Director of Echoes said they wanted to do; predicting Pokemon Detective Pikachu is getting new content as an IP on switch, a thing literally confirmed in a Pokemon Presents years ago; and, now, predicting FDC had sequel plans, a thing expressed by the director of the latest games).
I also kind of doubt Nintendo would let poor FDC sales in the west kill the IP; if it flopped in the west, then I imagine they'd just go "Aw, shucks, Japan-only it is." The Japanese limited-run physical edition outsold a plethora of MAGES games before you add digital sales and it's not like Nintendo loses money from letting an external company use an IP they have no use for.