Image from Gintama anime
Bandai Namco is publishing a new major information batch of Gintama Rumble in the latest Jump magazine. As reported by Ryokutya, Sakamoto Tatsuma has been confirmed added to the playable character list, bringing the current total to 12. He excels on gunfire and will have a medium-ranged moveset.
The final arc of the Gintama Chronicle mode that features eight famous arcs from the Gintama storyline has also been confirmed as Rakuyou Decisive Battle arc, and it will have Batou as the enemy boss.
In a related news, Bandai Namco has also published a Questions & Answers page on their Japanese official website, which gives more explanations to the game’s features. We have translated the Q&A as follows.
Q: Does this support cross-platform save"
A: Yes, this game does support cross-platform save. You can share your progress between PS4 & PS Vita, So you can play on the PS4 at home and continue outside on the Vita. Furthermore, the save data can also be shared between the regular and limited AV editions.
Q: What should I do to strengthen characters"

A: After collecting a number of experience points, the character will level up, and they will obtain CP (character points) which can be allocated at the Character Strengthening screen.

Note: Simply leveling up does not instantly strengthen the character.
Q: What kinds of CP allocation are recommended"

A:

If you want to use more Super Gintama items – Allocate CPs to Mind,...