Trailer when?

expect it 3 or 2 days before the banner releases.

It's actually today

I suspect that it will be the FEH channel we will get tomorrow/today (depending on your time zone). We know it's about CYL 2 and I think they did it before where they released the new heroes trailer a couple hours right before the banner starts.

Like if tomorrow's new heroes is NOT CYL2 I'd be extremely surprised