According to the news on March 31, OnePlus just announced today that the OnePlus 8 series will be released on April 16. According to the convention, the OnePlus 8 series should have two models, OnePlus 8 and OnePlus 8 Pro. However, there has been a lot of news before that OnePlus will launch a lower positioning OnePlus 8 Lite.
According to Twitter netizens, OnePlus 8 Lite may not be the final name of this product, but it is called OnePlus Z. In July 2015, OnePlus released the annual flagship phone OnePlus 2 and three months later OnePlus released the OnePlus X, targeting the mid-market. However, OnePlus has only launched a mid-range phone once, and has never launched a mid-range phone since.
gsmarena reports that the OnePlus OnePlus Z launched this time is not equipped with the Snapdragon 865 processor, but instead chooses MediaTek's Teana series processors. It's just unclear whether a high-end chip such as the Teana 1000 or a Teana 800 is used to target the mid-range market.
At present, OnePlus will release two new series within one year. If the OnePlus Z will not be released with the OnePlus 8 series, then it should be released with the OnePlus 8T series in the second half of the year.