YW4 could be the resurrection of the franchise. The next couple Famitsu charts will get pretty interesting.
"Resurrection" is a funny way to spell "massive decline."
YW2 first week in Japan = 1.2 million
YW3 first week in Japan = 632,135
YW4 first week in Japan = 100,000-130,000 (if YSO predictions are accurate)
People talking about the original YW game's slow start... that was because it came out in 2013, and only really took off after the anime in 2014. There's no new upcoming anime on the horizon that's going to suddenly appear and save YW4.