The Xbox 360 rendition is being handled by Spiders Games. As the name implies, the forthcoming release pits one of the world's most famed detectives against one of history's most notorious serial killers--a true showdown for the ages. nope
The PC version, developed by Frogwares Studio, hits Europe in May, a revelation celebrated with the several new screenshots above, and should arrive in North America come summer. As for the Xbox 360 release, there's no word yet on a timeframe.
The real question is, what (or who) is next? Holmes has already faced off against a mummy and Cthulu in Frogwares' games. Of course... there's always Godzilla.