The KPop Demon Hunters  train keeps going full speed ahead, with a worldwide live concert tour in the works from Netflix and AEG Presents. The streaming service closed out its Upfront presentation on Wednesday with the news. It pointed to the Oscar-winning film's popularity and global fan base. The tour, which is likely to feature Saja Boys and Huntr/X singers such as Andrew Choi, Neckwav, Ejae and Rei Ami, will start next year.  "We're going to keep that momentum going with our very first world concert tour," said Amy Reinhard, Netflix's president of advertising.…