LM 1 was a stunning game for me. The visuals were fantastic and it was about as scary as I wanted a game to get. Dark Moon was less scary, but had some many gameplay improvements that it too was a huge pleasant surprise. 3 is basically what Dark Moon was except with a different setting and better visuals. Each floor being its own unique theme was a huge blast. Honestly I love all three games for different reasons.
I expect 12-15 million. 12 if Switch receives no pro variation and Switch 2 comes 2023. 15 if they do and stall on Switch 2 until 2024-2025.