Well, this wouldn't be a place where you could vote for things that haven't even been conceptualized yet. The basic concepts might already be worked out, and they would be presented to the player as something they might like (similar to how ANet recently offered players a choice between adding a "Fall of Abadon" fractal or a "Thermanova Reactor" fractal). If the players rapidly fund the project, then more team members would be placed on fast-tracking the project. If it takes a while to gain full funding, then a skeleton crew would continue to work on it while other team members would be working on other projects that used similar skills. If the project did not see funding at all, then it may be scrapped entirely, the team moved to a different project, and any art assets or gameplay mechanics developed for that project might be salvaged and used elsewhere.