Can everyone on your team devote enough time for this project?
It's okay if one of you can't. Just make sure the team has communicated specifically how much time and resources each team member can spend. Setting expectations is the first step to preventing a co-founder breakup (1 out of 4 startup co-founders end up breaking up).
So this is more important than you think. Also this is helpful because the amount of time and skills/resources a co-founder can put into the company will also determine the amount of ownership the co-founder has in the startup as well.