Gegz
It's all in the game yo'
I'm on IOS. It was under maintenance for me when i've read a message on NeoGAF saying that the multiplayer was open. After a few reboots of the app, i was able to play.Still says "temporarily down for maintenance" for me. Are you on iOS or Android?
The multiplayer stuff is just your team against teams from other players, no direct fight between 2 people. I'm grinding the first ladder (Only one fight)