Hitman 6 was in development by Square Enix Montreal, a newly established studio headed by veteran IO Interactive employee of 11 years, Karsten Lund. It is now however currently in development by IO Interactive according to a Square Enix representative.
Square Enix Montreal who were originally working on the next Hitman will now only develop games for Smart Devices.
No subtitle has been officially confirmed, but there's one possible trademark for the name, "Hitman: Profession" which was filed in Europe in December 2011, and another ones: "Hitman GO" and "Hitman Sniper" filed August 2013.
Absolution game director Tore Blystad mentioned in an interview with IGN before IO took over the project IO would still be working alongside SE Montreal on certain elements of the next Hitman title. "They will feed off each other, as well as some things that stand out. I think with these big franchises it takes a long time to develop just one game. If you can, work a little bit in parallel at least and help each other out." Tore also stated rather than doing the same thing again Square Enix Montreal would have shown another take on Agent 47 from a fresh perspective.
A rumor prevailed that three developers from IO would be moving to Montreal from Denmark to help out with the project. This was before IO announced that they would be taking full control over the project.