This morning Gung Ho Online Entertainment announced that Ragnarok Odyssey Ace will feature crossover content from fifteen different games, one of which still unannounced. The content will be made available for over months after release.

It's highly unlikely for the unannounced game to come from another publisher, as this kind of data is normally kept under wraps until it goes public, let alone striking a crossover deal with a different publisher even before the official announcement, so we can pretty much expect a new title announced by Gung Ho between now and little more than three months from now.

But what will that game be? There actually is a probable candidate:

With Killer is Dead out of the door, Grasshopper Manufacture is now free to enter full production of its new mainline title, and we actually already know something about it. Back in March, Goichi Suda and Gung Ho Honcho Kazuki Morishita teased an upcoming Grasshopper Manufacture game with a few pictures.

The game still doesn't have a title, and all we know is that it will be a slash action game with a strong female lead, to be released for current generation consoles and possibly on next generation ones as well. It will be set in a near- future Japan after an unspecified catastrophe devastated the country.

As you can also see from the picture above the "strong female lead" definitely looks like No More Heroes' Shinobu.

Of course we don't know for sure if Shinobu's Return (I just invented this "working title" so please don't take it as official) actually is the mysterious unannounced game, but the timings and all the hints line up quite perfectly. For all we know, it could even be No More Heroes 3. 

All we can do now is to wait for the official announcement.