Atlus has shared lots of information about DLC in Shin Megami Tensei V as well as how New Game Plus works in the Switch RPG.
How SMT V's New Game Plus Modes Work
Shin Megami Tensei V's Launch-Day DLC Detailed - Game Informer
New Game Plus Features : How to Unlock NG+ Shin Megami Tensei 3: Nocturne (SMT Nocturne)|Game8
Rumor: Shin Megami Tensei V 'Complete Edition' announcement teased by notable Chinese leaker - Gematsu
Shin Megami Tensei V: Vengeance Steelbook Launch Edition - Collector's Editions
Remnant II - The Awakened King DLC Launches with New Trailer
Atlus Reveals Information on Soul Hackers 2 DLC - Siliconera
Shin Megami Tensei V: Vengeance - Announce Trailer, NSW, PS4/5, Xbox Series One, X
Shin Megami Tensei 5: New Game Plus Unlocks
Shin Megami Tensei V: Vengeance Has Been Rated In Korea
Shin Megami Tensei V: DLC Bundle
How to Beat Shiva in Shin Megami Tensei V (SMTV Superboss)
Shin Megami Tensei V's Launch-Day DLC Detailed - Game Informer