D/P remakes being released soon has been common speculation ever since after ORAS. It seems like something that'll be inevitable, but how long away they are is anyone's guess at this point.
I'd be in favour of them if what Gen 8 mechanics they have are mainly relegated to just 3D models with there being actual effort put in place of bringing Sinnoh into 3D without the Wild Area, Gigantamax, etc. and assuming they went with Platinum as the template for the dex and NPC team rosters as opposed to D/P with its 2 Fire types and other egregious things such as Electivire, Magmortar, etc. being post-game (something almost as bad as Gen 2/HGSS making it so you couldn't catch Johto Pokemon like Houndour and Larvitar until you got access to Kanto
). I'd honestly just prefer a remake of Platinum in general with how vastly it improved on the Gen 4 games to the point of future games in the timeline treating it as the canon version (eg. Cynthia referring to the boy who stood against Giratina when talking to the player in Black/White), but obviously Game Freak treats marketing as their priority.
Most of all, I'm curious on what they'll do with Dialga and Palkia (and maybe Giratina). ORAS seemed to set a precedent for beefing up the boxart mascots with Primal Groudon/Kyogre and not leaving the trio with a complete bronze medal by giving Rayquaza the most OP mega. I'd personally not see much way they could make Dialga/Palkia more beefed up with how intricate their designs already are (unless they rehash the 2nd duo of Mystery Dungeon games with Primal Dialga) and Giratina already has its original form. Leaving them alone would be the safest route, but somehow I doubt that'll be the case.