Fast Five scooped $86.2 million on its opening last weekend in the US and $81 million across other markets.
Speaking to USA Today, the helmer said: "After this big weekend, we're going forward. It's pretty much 100%. It's going to happen."
He added: "At five, we're just hitting our stride. We're growing. People want to continue this journey."
Lin is also pegged to direct the Terminator reboot starring Arnold Schwarzenegger.
Watch our Fast & Furious 5 behind-the-scenes exclusive below: