The Conduit 2 could be on the way from High Voltage, if hints from GDC come to pass.
G4 reported that the developer, who were showing off its new games in Tournament of Legends and The Grinder, had a poster in the demo room showing a massive number 2 with Conduit-like font.
When asked about it, all the studio would say was: "There's more to come on that!". No pictures were allowed of it though, so you'll just have to trust G4.
The Conduit released last summer for Wii from Sega, but didn't do too well in terms of sales: the game sold only 150k in its first week.