The mini direct may have been disappointing for some but knowing both of these are coming in 2021 is great news. I've not played a mainline SMT game, just some of the spin off titles like something called Persona.
From the outside as a newer Atlus fan, SMT is darker in tone to its Persona counterparts from I am told which is fine by me.
Also, now with SMTIII going to be on Switch the whole mainline series is on Nintendo:
Shin Megami Tensei SNES/GBA/Nintendo Online
Shin Megami Tensei II SNES/GBA
Shin Megami Tensei III: Nocturne HD Remaster Switch
Shin Megami Tensei IV 3DS
Shin Megami Tensei IV Apocalypse 3DS
Shin Megami Tensei V Switch
I might be crazy but maybe Atlus should have a SMASH rep