Maybe. But I'm thinking we'll be getting an announcement on it. The game(s)? I don't think they'll be out this year.
Unfortunately that's not usually their style and it's probably not in their best interest to do so. They haven't had a full new game since 2021, and I don't think they delay it to 2022. What they could do to compensate for any issues is release DLC in 2022 to fill in the gaps, which would be scummy, but IMO would be preferable to leaving it incomplete like ORAS. It's a matter of whether or not they're willing to spread 8th gen out to 4 years instead of the typical 3 year generations like they've been doing lately, and I'm not so sure they are.
It would be great if they brought back actual digging for treasure again though.
Yeah, the digging NPCs just aren't the same as the digging minigame in the Underground, so I hope that they bring it back in full. Maybe that's one way they could integrate Max Raid battles if they feel so inclined to work that in (ORAS had some 6th gen mechanics like Mega Evolutions, Horde Battles, and the PSS, so it's plausible that Sinnoh remakes could have 8th gen mechanics such as Dynamax, Max Raid Battles, and the Y-Comm).
If we're getting into wishlist territory though, here's what I would want to see out of Sinnoh remakes:
-No significant cuts to the region and no streamlining the level design too much.
-HMs return as a Poke Ride/Secret Technique sort of mechanic, and most of the field moves return except for Flash and Defog (Rock Smash, Cut, Fly, Surf, Strength, Rock Climb, and Waterfall should stay).
-Sinnoh Dex should include Platinum's expansion, cross gen evolutions, and the remaining 4th gen legendaries (also the Regis since they're needed to awaken Regigigas). Preferably there should also be Sinnohan variants (I'm not sure if they'd put them in the main game, they seem to be averse to adding new Pokemon to the main games in remakes), but if not they should have the Sinnohan variants and the remaining Pokemon not in SwSh in a post game dex expansion.
-Sinnoh Underground returns, and is now online. Additionally, there are now Max Raid battles in the Underground.
-The Great Marsh returns, but without Safari Zone mechanics. They could instead have Go capture mechanics or just make it like a Wild Area.
-Contests return.
-A Delta Episode-esque story arc involving Giratina, the Distortion World, and Arceus.
-Additionally story arcs (possibly through DLC since they probably won't be able to fit all this in in the base game) for other event Pokemon such as Cresselia/Darkrai, Shaymin, and Manaphy.
And that's about the minimum I'm willing to accept for DP remakes, if they have much less than this I'm not buying it.