Newsbrief: In what has become a continuing trend for the service, the upcoming PC version of Capcom's Resident Evil 6 will contain Valve-contributed content when it becomes available on the Steam platform on April 5.
Characters from Valve's Left 4 Dead 2 will be playable within Capcom's Resident Evil 6 and, likewise, enemies from Resident Evil 6 will appear in an update for Left 4 Dead 2.
This isn't the first time Valve IP has appeared exclusively in the Steam version of another publisher's game: previously, characters from its Team Fortress 2 appeared in the Steam versions of Sega's Sonic & Sega All-Stars Racing and Robot Entertainment's Hero Academy.
I really want Valve to make a shameless Smash Bros knock off, they have enough franchises now: Half Life, Counter Strike, Left 4 Dead, Team Fortress, Ricochet (ha!), Dota.