In a take-two earnings call, it was mentioned that the Borderlands franchise has sold over 43 million copies across all games. Borderlands 2 is good for the majority of the sales as it sold over 20 million copies. Which is a game that is still going on strong as it still has over a million active players a month.
With Borderlands 3, executives expect to “grow sales with each title” in a franchise. If we extrapolate this, Borderlands 2 hit 7.5 million units within a year. It has now sold 20 million in its lifetime. This implies that Take-Two/2K Games expect these to be surpassed.
This is great news for the franchise, hopefully, this also results in a lot of DLC for Borderlands 3. Because when a game sells well, the publisher often puts more support towards that game.