I have doubts this is Smash 5. Feels way to early for it especially with Metroid Prime 4 and Pokemon Switch in the horizon.
It's either an enhanced port of 4 or it's a sequel without Sakurai, in which case it's an enhanced port of 4
We the best
We will cut a frowny face in your chest, little wench
I'm unmentionably fresh, I'm a mensch, get correct
I will walk into a court while it wrecks, screaming "Yes!
I am guilty motherfuckers, I am death."
Hey, you wanna hear a good joke?
Nobody speak, nobody get choked