I will sort this by what I think is most likely to least likely.
1. DDD 2 for consoles.
I can see them doing a DDD sequel with Riku and Kairi as the two playable protagonists. Story would revolve around finding Sora in Quadratum, with Kairi getting trained by Aqua.
2. A PS4/PS5 KH game with Yozora as the protagonist.
To me, this game would be the perfect way to start off the 2nd phase. We would most likely get an entirely new type of gameplay, and Nomura finally gets to create his beloved Versus XIII within the KH universe.
3. KH Ux remake for PS4/5, PC and Xbox.
4. KH 4.
As far as I remember, there was a 3 year gap between the release of KH 1 and 2. Maybe this will be the case once again for KH4. If it is, then we can expect a KH4 announcement during the E3 this year or at the TGS.
5. A re:com, bbs, days, re:coded, and DDD remake for smartphones.
Although I would prefer them doing it for consoles, it's not unlikely they will pull off an FF VII Ever Crisis for Kingdom Hearts.
6. A Disney+ KH Animated series.
Rumors have been there for a pretty long time.
7. A KH title with Mickey, Donald, and Goofy as the protagonists.
They would basically revisit every world Sora visited from KH1 up to KH 3.
8. KH 1 & 2 Remake for PS5.
This is what I think is the least likely. However, this would be a great opportunity for newcomers to and veterans of the KH dev team to become familiar with UE5 and to get an idea of what made KH 1 & 2 so great and iconic.
1. DDD 2 for consoles.
I can see them doing a DDD sequel with Riku and Kairi as the two playable protagonists. Story would revolve around finding Sora in Quadratum, with Kairi getting trained by Aqua.
2. A PS4/PS5 KH game with Yozora as the protagonist.
To me, this game would be the perfect way to start off the 2nd phase. We would most likely get an entirely new type of gameplay, and Nomura finally gets to create his beloved Versus XIII within the KH universe.
3. KH Ux remake for PS4/5, PC and Xbox.
4. KH 4.
As far as I remember, there was a 3 year gap between the release of KH 1 and 2. Maybe this will be the case once again for KH4. If it is, then we can expect a KH4 announcement during the E3 this year or at the TGS.
5. A re:com, bbs, days, re:coded, and DDD remake for smartphones.
Although I would prefer them doing it for consoles, it's not unlikely they will pull off an FF VII Ever Crisis for Kingdom Hearts.
6. A Disney+ KH Animated series.
Rumors have been there for a pretty long time.
7. A KH title with Mickey, Donald, and Goofy as the protagonists.
They would basically revisit every world Sora visited from KH1 up to KH 3.
8. KH 1 & 2 Remake for PS5.
This is what I think is the least likely. However, this would be a great opportunity for newcomers to and veterans of the KH dev team to become familiar with UE5 and to get an idea of what made KH 1 & 2 so great and iconic.