Here's what we do know...
According to French electro band M83's website, they're playing in Hong Kong on May 4. This is a total guess, but it seems probable they'd play a show or two in the mainland as well.
Now, more interestingly, MINIKISS -- the all-little people Kiss tribute band -- has a completely open calendar in April of this year, so we're jumping to the obvious conclusion on this one -- MINIKISS in Shanghai April two-oh-one-six. You heard it here first, y'all. It's just a question of putting two and two together here, people.
Modern Sky is also jumping on the MEGaEDMfestivalRage train with an EDM festival two weeks later, also at the Expo park, entitled MYTH. Ah yes, the Myth of EDM… More news on headliners as soon as we get em.
Incidentally, MINIKISS has an open calendar for May as well. We'll let you know when they confirm for Modern Sky's EDM festival.