There are some situations where rooks become active in the opening, but they are rare, and often only enabled by blunders of the other side.
One example: White has castled with a knight on f3, black has not castled and the black bishop pins that knight. Now sometimes h3h3
can be met with h5!?...h5!?
, and if white accepts the sacrifice with hxg4 hxg4hxg4 hxg4
, the black rook enjoys suddenly an open file, and white is in serious trouble if the black queen can join the attack.