Talking to EW, Singer said he is "co-writing the story and I’m producing it. I'm negotiating to direct. We're in the process. We're trying to figure it out, schedules. My desire would be to direct it."
He also told the magazine that he's not sure if "Days of Future Past" will include a tease for "Apocalypse." "I'm still deciding that. Something that happens in this movie causes what's going to happen in that movie."
And what can he reveal about the 2016 movie? "It will also address historical mutant-cy, meaning the deep past, mutant origins and things like that. It's something that's always intrigued me when we think about our Gods and our history and miracles and powers."