The evidence is steadily building for an impending Mirror's Edge 2 announcement. Just a week after we saw the game listed on a German retailer, EA itself seems to have let word slip with the brief appearance of a help page on the company's official site.
The help page, caught by NeoGAF users and captured (above) in screenshot form by our own Alice O'Connor, shows the title plain as day. It doesn't shed any light on details like platforms, but that does seem to all-but confirm the sequel. As NeoGAF user "ekim" points out, replacing the URL with terms like "mass-effect-4" and "fifa-15" doesn't work, so EA isn't in the habit of making help pages for unannounced games. The page was later pulled. That makes three spottings so far, after Amazon Germany, and later, a pulled Amazon Italy listing for Xbox One.
It seems likely that an announcement is imminent, possibly at E3 in two weeks. If so, look surprised. Shacknews has contacted EA regarding the help page, and will update as more information becomes available.