The release order so far is:

Yakuza, 2, 3, 4, 5, 6, 0, Kiwami (remake) 1, Kiwami (remake) 2.

As far as I know, Kiwami 3 is up next, but I could see a Yakuza 0-sequel at some point. There are a few years between the end of Yakuza 0 and the events leading up to the original Yakuza, I think.

I wouldn't mind a Yakuza pre-prequel with the older generation, either. A game focused on Shintaro Kazama, Tsukasa Sagawa, and Masaru Sera could probably work, and it would allow for another change in setting - men in their 50s or 60s in the 1980s would have their gangster days in the 1950s, in a very different Japan.

The release order so far is:

Yakuza, 2, 3, 4, 5, 0, Kiwami (remake) 1, Kiwami (remake) 2.

As far as I know, Kiwami 3 is up next, but I could see a Yakuza 0-sequel at some point. There are a few years between the end of Yakuza 0 and the events leading up to the original Yakuza, I think.

I wouldn't mind a Yakuza pre-prequel with the older generation, either. A game focused on Shintaro Kazama, Tsukasa Sagawa, and Masaru Sera could probably work, and it would allow for another change in setting - men in their 50s or 60s in the 1980s would have their gangster days in the 1950s, in a very different Japan.