The game is set to be released early next year, January 18, 2018 where the game will come with Japanese voice over and English subtitles. The announcement also comes with the day-1 Bonus Item that players voted on, which practically is:
The Neo Armstrong Cyclone Jet Armstrong Cannon. Here are some details that you need to know in terms of how to acquire this uh…. cannon
The following rules and regulation applies:
Game contents or design may change without prior notice.
Day-1 bonus are limited in quantity and distributed while stock last.
Some retailers may not have the product code. Please check with your local retailers before purchase. Please don’t look for us.
Redemption requires a PlayStation®4 with internet connection and an active Sony Entertainment Network account.
Product code has a validity period.
Day-1 bonus DLC comes with the initial package release only.
Day-1 bonus DLC is available for the digital release as well. However, it will only be available until 14 February 2018, 2359 hours (tentative).
So yeah, aside from the cannon, the Gintama announcement also comes with the announcement that SPYAIR is the group assigned to perform the upbeat theme for the game titled, Scramble.
Gintama Rumble is set to be released both physically and digitally for the Playstation 4 system in Southeast Asia regions (Singapore, Malaysia, Thailand, Indonesia, and Philippines)