So i read something about ranked team builder?

Well technically you can make a 5 man pre-made team.

But the chances of you vsing another pre-made team is very high, you'll rarely vs people that Solo Que alone.

But if you do congrats on the free win.

The new champ select that is coming out is sorta like team builder. Each person picks two roles (top,mid,Jung,not,supp,fill) or just fill when they queue up and when you get put into a team, it tells you what role everyone is. You're guaranteed one of the two you picked. This will be included in ranked too