Solo Q no longer Solo?

I was just reading up on the new matchmaking system and discovered you can play ranked games all the way up to 5 man teams?!?! Has Riot announced anyway to balance this? Or will my worst fears be realized, and if I enter matchmaking alone I will be paired against a 4-5 pre-made team comp who are all using voice communication software as I flounder with text chat on an all random team.