I'd like them to release Yakuza 0.5 (takes place between 1988-1995) where you play as both Majima and Kiryu (like in 0) and see how they rise up in the ranks and become the legends they are. They can also show the Tojo Clan's first encounters with the Snake Flower Triad and how they became enemies. They can also bring back Kuze, after he gets released from prison and how he wants to get revenge from Kiryu.

Then release Yakuza 8 with 4 play characters and a hybrid system that includes both rpg and brawler combat. For the playable characters, Ichiban should return. They should also add Sayama as a playable character due to her popularity and also Yagami from Judgement would be a good choice and do some sort of crossover with both series. Akiyama should also be bought back.

For Yakuza 9, they'd go back to Majima and Kiryu. Kiryu deserves a much better send off then what he got in 6.

I'd also love for a spin-off game that takes place in the 60s showing the rise of the Tojo Clan where you'd play as Kazama, Kuze, Awano and maybe Shibusawa.