I think we have a ways to go before videogame movies reach the current heights that capeshit is currently experiencing. I'd say that they are currently at the "superman" state where it has been proven that the concept can work. The next step is for videogame movies to have their "Batman": A film that in addition to being a critical and financial success also had a hugely succesfull marketing campaign and merchandise (though unlike Batman it likely won't change the game for blockbuster movies)I can definitely see the early 2010's coming back as part of a wider 2000's revival since 2010-2012 is increasingly being seen as part of the late 2000's culturally (the whole era of 2008-2012 was sort of its own weird thing, sort of an "era within an era" deal)
I think TMNT is the only 80's nostalgia thing that will stay because it never fully went away to begin with. The Turtles are one of those "evergreen" comic book properties that will always be around like Batman and Spider-Man. I also agree the soulless pandering is another key issue to the 80's/early 90's nostalgia movement of the 2010's.
The late 90's/2000's/early 2010's nostalgia movement is looking like it will be a more genuine appreciation of the older works and making them work in a new context that isn't just woke shit or "how do you do, fellow kids?" pandering.
A lot of the video game remakes from the PS1 and PS2 eras seem to be indicating this, and even the "bad" remakes like the Resident Evil 3 remake aren't all that bad, just more of a "so okay it's average" case compared to stuff like Resident Evil 2 Remake or the Destroy All Humans remake.
Spongebob will definitely be given this nostalgic treatment considering Spongebob is one of those icons of early 2000's pop culture.
Disney's probably still going to be a big monolith but I don't think they'll be the invincible and unstoppable force they were in the 2010's, especially if we see some MCU box office bombs before the X-Men can enter the picture.
Bob Iger and his megalomania will no longer be a big issue after 2020 is over, and I think Chapek won't be as eager to buy up everything and depending on how bad Disney is hurting financially, might even sell off some of their IP's from the Fox merger to other companies or sell off some of the smaller subsidiaries like A&E and History Channel.
DC will still be a thing but they usually played second fiddle to Marvel in movies for most of the 2000's and 2010's, and any DC properties that will be successful in a post-DCU/MCU world will likely focus around Batman and maybe Wonder Woman.
I also think video game movies might be a more viable thing in the 2020's now that Detective Pikachu and Sonic seem to have "broken the curse" and proved video game movies can be both good and financially successful.