The upcoming Crackdown game for Xbox One is making "great progress," according to head of Xbox Phil Spencer i.e. someone who would definitely know. Asked on Twitter if the game would be part of Microsoft's E3 2015 lineup, Spencer wouldn't say, but did provide a brief status update on it.
"Sorry, not announcing what games are where right now," he said. "But Crackdown is making great progress."
Given that Microsoft will focus more on first-party games at E3 this year, it seems likely that Crackdown will make an appearance during the company's event. But don't expect Spencer to talk more about Microsoft's E3 plans until the show itself. If there are leaks, they won't come from him, he says.
"We aren't great at keeping our E3 news our until E3," he admitted in another tweet. "Last think [sic] team needs is me leaking stuff."