http://www.pcgamer.com/we-have-never-said-anything-about-discontinuing-that-title-says-yosuke-matsuda-on-the-future-of-deus-ex/

Earlier this year, Jody considered the uncertain future of games like Deus Ex and Dishonored in the wake of poor sales. Within, Eidos Montreal said it was "not quite ready" to answer questions on why the former had underperformed, nor would it commit to the possibility of new Deus Ex games down the line. 

In conversation with gamesindustry.biz, Square Enix CEO Yosuke Matsuda has all but confirmed Deus Ex will live on—despite other projects taking priority at present. Square Enix has published the series since 2011's Human Revolution.