I think the main reason Groo [HeroClix] never went forward (and a lot of other indie stuff, like Usagi Yojimbo) is that there simply wasn't enough interest among the fans to make it financially viable. Even some of the collector's packs didn't sell as quickly as we wanted them to; there weren't enough completists out there in Clixland to justify doing things like Groo, whose fanbases were so niche that there wouldn't be a wider appeal either. Which is really too bad, because including the Indy stuff was one of the best things HeroClix ever did for itself in terms of character diversity and reach of the game.
Jason "Brother Magneto" Mical, HeroClix World Interview (2009)