I'm not an artist so I couldn't whip up a cool concept art, but Oni 2.0 could be the greatest skin bundle to date if done right.

Best guns- Vandal, Operator, Classic/Sheriff, Stinger/Spectre, Katana

Melee-

1. Oni Katana would be like the Protocol knife in that it can swap stances. It's main stance would be like RGX katana, but upon right clicking would change to a new stance or reuse the greatsword stance (Prelude to Chaos or Ruined)

2. Oni Katana + Oni fan. Dual wielding a fan and katana could be really cool and allows some amazing inspects.

Finisher- Instead of Oni 1.0, where the enemy gets the mask on them. The finishing character's spirit is wearing the mask and executes the enemy with many slashes then returns to the finishing character. For example, you are Brimstone and you killed the enemy Jett for the finisher. Brimstone's spirit would exit your body, while wearing the Oni mask, then slash the Jett and return to Brimstone's body. This could be a cool follow-up to Oni 1.0. Also if finishers would match colors or change the finisher depending on what variant is equipped.

What do you want from Oni 2.0?

I think an Oni fan would be cool but a katana would most definitely be more popular.