Blood bowl didn't get any support from GW as soon as they realized people stopped making teams at a point. The ruleset, however, has been refined to one of the best board game by the company.
That said, the models of bloodbowl are really old, and i am sure people would be all over new versions of their teams if they were released. It's just that GW has pulled the plug on it.
Warhammer (and its 40k version) is just silly with the schedule, as mentionned above. Some armies can wait for a decade for an update or even new models, which often require a total revamp of the player's armies (in order to sell the new models).
Malifaux drew me and my GF due to the theme and style, as well as the low miniature count. That makes it simple (something very important for my GF) to learn, but with complex tactics regardless depending on what models you pick. So if i am a tactical nut i can go and pick Colette, but if i feel all brawn i can go for Perdita. I do hope that it won't go away from that small, over the top skirmish mood.
There's still tons of stuff that can be added, along with new models. As stated above a cooperative ruleset (for 3+ players) would be awesome. Rules for experience and campaigns too. I just don't want to field "armies of malifaux"