1. Persona 5 (PS4)
2. Fallout 4 (PS4)
3. Xenoblade Chronicles X (Wii U)
4. Deus Ex Manking divided (PS4)
5. Legend of Heroes: Trails of cold steel (PS Vita)
This is sort of the realistic most wanted list. Things like FFXV, Star Ocean 5, Kingdom hearts 3, Mass effect 4, etc. who knows if they will even come out next year. So, i'm not filling those in.
Fixed that for you.
Japan Switch Sales comparison vs 3ds and Wii u: http://gamrconnect.vgchartz.com/thread.php?id=226216&page=1