LuisCarlos17f
Legend
If I try to imagine D&D style 80's vibes my mind visualizes Elmore's pictures for Dragonlance. The 2000-2010s or 3Gm (age of the third generation mobiles) was Greyhawk and the iconic class characters. Visually 4e had got a lot of Warcraft-like visual style but I can't feel inspiration to create new stories. How to explain it? Do you remember when you were a little child and you want to draw the characters of your favorite cartoon show? But you weren't interested at all about other franchises.
Greyhawk could be the best option to sell nostalgia if the redesign was right, but keeping the spirit or essence of the IP is too subjetive.
The reboot of my little pony has been a great success but it didn't sell nostalgia for G1 (first generation). It was designed to appeal the next generations of children. The popularity among lots of adults was a surprise.
* Maybe WotC would want to be the translator of 3PPs in other markets now when they are their own publishers and they have their own translator team.
* Let's remember 5e is enjoying a boom or rise of new setting thanks 3PPs with their crowdfunding campaings but they suffer the risk to fall into the oblivion when the players focus their attention on a new title, forgetting the previous ones. Here the store of D&D-Beyond could be an adventage as showcase.
* WotC is not interested into create new settings because lots of players would rather to create their own worlds. If there was one this would be Witchlight.
If WotC wanted to create a new class after the psion maybe the favorite option would be a monster-trainer like "Batlezoo" by Roll for Combat. Their previous experience about classes with special mechanics is these aren't "expansion friendly".