Back in 2014, an established Chinese game development studio called Shanda Interactive Entertainment started work on Borderlands Online, a Chinese-market-only MMO version of the two-games-deep Borderlands series. Gearbox was trying to get a jump on the growing Chinese PC gaming market, clearly, but the game didn't happen: It was cancelled in 2015 when Shanda left game development entirely. All that remains now are some screenshots and (rather weird) trailers.
Now, on a passionate whim, some fans have dug up an ancient build of the game from virus-infested defunct Chinese websites and are hard at work on making a playable version of the long lost Borderlands game. (Which they wouldn't have been able to play if it had been finished, because it wouldn't have been released outside of China.)