Shin Megami Tensei III: Nocturne HD Remaster and Shin Megami Tensei V

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  

I know nothing about the core SMTs apart from they have demons that look like genitalia. 'Darker' doesn't sound great for me, but I guess I'll keep an eye on these.

Persona also have those demons but as shadows instead.

I think because Persona is in high school and you hang out with your mates etc it comes over as lighter where I think SMT is more doom and gloom in terms of the whole world being taken over etc.

But these are huge announcements not quite but close to a Dragon Quest or Final Fantasy for Atlus as those are to Square Enix.

Its kind of a monster-battling RPG, right? I should give it a go . . .

Yep you recruit demons and they battle for you I believe

From what I understand, the way you recruited Personas in P5 draws heavy inspiration from how you recruit demons in SMT. It's quite neat in that you've got to persuade the demon to join you. I've never played a mainline SMT game myself - I assume that this is a Final Fantasy situation where numbered titles feature new stories and characters and don't require having played the previous games in the series, yes?

That is correct or you have games like Shin Megami Tensei IV and Shin Megami Tensei IV Apocalypse which Apocalypse is the sequel or the X-2, XIII-2 of SMTIV