With that in mind... Personally, I really want to know what happens after Sims 2. We only know of Don Lothario, who was sent to the past and Dina/Nina Caliente who moved to Barnacle Bay. BUT... there's some things I want to keep in mind.
Sims 2 will probably be unplayable in the near future, in more modern computers, and I don't think the devs will update the game's graphics to be able to run in newer machines. Also, a loooot of players started playing Sims during Sims 3/4, and probably didn't experience the whole Bella Goth storyline. AND, if we went with a game after Sims 2, following my "fixed timeline" for SIms 4, most premade sims from our current iteration would be elders/dead, and I don't think its positive.
What I want: Sims 5 to be a "soft remake" of Sims 2. I say soft remake, cuz everytime I see someone asking for a Sims 2 remake/graphics update, someone shows up saying they don't want all sims game to be the same game (which is kinda d*mb, its a life simulator... but anyway). I want Sims 5 to be its own thing, but still remaking Sims 2.
Release Sims 5 with 3 worlds, like SIms 2, but instead of Pleasantview, Veronaville and Strangetown they could remake:
Willow Creek (presenting us the Pancakes with a thrilling storyline similar to that of Pleasantview/Bella Goth, maybe Iggy older dating Olivia Kim-Lewis, Travis Scott married to Liberty Lee and having a feud going on with Summer Holiday, Alex Moyer married to another woman as a lesbian couple, and Babs L'Amour married to Ollie Purdue with the 3 children we've seen in som of Sims 4 trailers). And to make WC new and interesting to explore, isntead of the same old boring world, make it so that we have visual changes to how towns evolve overtime. Maybe an apartments neighborhood, bigger premade houses as if inhabitants had evolved and lived in them.
Windenburg: In Sims 4, this world is full of drama which could be expanded in Sims 5. Evolve the town, open up new places to explore/live, like I've said above. And, maybe connect it to Veronaville having the SIms 2 family bins form this town living here.
Oasis Springs: The Caliente Sisters moved to PV with Don, and they left their mother behind. Maybe Katrina married J Huntington. Have Zoe Patel choose between the remaining boys/Johnny Zest. And have Malcolm, Johnny, Mom, Mimi, Dudley, Hannelore and Adrien in a huge family feud + the evil Malcolm storyline frm Bustin' Out + dead/elder Nancy and Geoffrey.
Than, add exact remakes of the Sims 2 expansion packs/stuff packs + new expansion packs/game packs/stuff packs with new content. Have a fused Strangerville/Strangetown be the town of a Alien Game Pack, Veronaville could be in another pack we didn't had in Sims 2, and Pleasantview remaked in Generations Expansion Pack.
ALSO, I want to know what happened to other Sims 1 characters during SIms 2 timeline, like Claire Charming, the Hicks (Is Mama Hick, Don Lothario's grandmother?!), Roomies (I always thoug they were a lesbian couple when I was a kid, and there's rumors that they are two supermodels in the H&M trailer for the SIms 2 stuff pack), Maximus, Hatfield (is Ruby Ann the same as Ruby Broke from Riverview?).
anyway... I just hope Sims 5 treats its premade sims/worlds better than Sims 4 did.