"We have enough game ideas to do 'Geometry Wars' for probably about 10 games," said Cakebread. "It depends on what will work." Things that didn't work and ended up being removed from Geometry Wars 2: Gimmicky multiplayer modes, such as a a soccer/football-style game that had players shooting objects into gravity-well goals. Things that might work in the future: Developer Bizarre Creations isn't saying, as it might "use them in the future for god knows what."
Things that work in today's industry: Good franchises! "Geometry Wars is definitely a franchise," noted Bizarre manager Craig Howard. "It's not going to stop." Well, not unless you release a bomb.