SSBU Question: How will the 8 Controllers work?

[Jranation]

Thanks guys, and these are my controllers so far: (since im going to bring this to school )
- 4 wii remote + nunchuck
- 1 wii u pro controller
- 1 gamepad
- 2 3ds + Game (1 of my friend will bring one)

Since im not buying the gamecube one, i hope this would work. PLANNING AHEAD!