I've just found a
story in the South China Morning Post from a few days back claiming that City play Inter in Hong Kong on 1 August, with Chelsea facing Juventus on 4 August and Bayern meeting Aston Villa on 7 August (both the clubs involved have already confirmed the latter on their official websites).
Another local news source says the organisers will hold a news conference on Tuesday, 21 April.
Villa's story on their website about the Bayern fixture states that they're likely to announce other matches in the Far East in dur course. Presumably we also will, and it wouldn't altogether surprise me if we announce that we're playing one of Chelsea or Villa out there at some point. That's purely a guess, though, and I claim no inside knowledge.