MEGA IDEA -
Suzuki san, if you want to make the world blow up, please include a Shenmue version of this game as part of an arcade "timed event" and game feature:
SEGA SUPER CIRCUIT
Videos -
https://www.youtube.com/watch?v=7ZgH7vNzUdU
https://www.youtube.com/watch?v=XqexeuTP0K0
Now, this game should be an event like what was done for the Duck Race and fighting tournaments in Shenmue II. You have to make sure you attend the tournament on certain days at a specific time in order to progress all the way to the finals. The catch is this element can affect the story in some shape or form and you can also earn fighting scrolls and something incredibly special that can affect your relationship with Shenhua (your purpose) and the branch progression pathway of the game.
Now, something like this also give you the opportunity to incorporate mechanics you've already created in many of your games such as Outrun 2 and the track design world can become incredibly imaginative.
When it is not your turn to participate in the tournament, you can, just like in the videos shown above, can watch on the side-lines with the crowds of people.. heck, there will be a point that even Shenhua would participate and you have to cheer her on and give advice. Also, when you are not participating, you can have the opportunity to purchase your own SEGA SUPER CIRCUIT vehicle and you have to keep racing outside the tournament to win special arcade credits/coins (soft-currency). When you win them, you can go and purchase parts for the car from the local electronic store. When you have purchased you have to install them yourself onto the vehicle, which can be done automatically that will result in a partial installation, or manual with will involve a mini-game in order to do a perfect full performance installation. To make it more important, you can have a local arcade bully that attempts, and succeeds, to destroy your vehicle as he wants to badly win the tournament. Of course, when the tournament is finished and you've won, you can still play in SEGA SUPER CIRCUIT and participate in small tournaments here and there, but you will no longer have your own car, and the outcome of your winnings will not affect the story (i.e. it will be like any other arcade game).
If done well together with different tracks that is based on different floors in the game centre like Club SEGA (there were awesome arcade venues in China too), it will make everything feel like a mega hyper land of golden age gaming, and gives the arcade centre a more purpose within the game. An in-game commentator (if budget allows for it) together with support from Ryo's friends, Shenhua, and the screaming of crowds of people that increases at the height of the tournament must also be included for sound is incredibly important. Also, the beauty of this idea is that the "game's world" is the graphics, not the SEGA Y board graphics used in games like Power Drift (opportunity to do something wonderful and glorious together with neon lights, the works!)
For those who are in doubt about SEGA SUPER CIRCULT, it is a multiplayer game created in 1987 and it used Outrun cabinet as the seats. The vehicles got cameras inside them which is displayed on the actual arcade cabinets.