+1. Brainstorming is a way to generate leads by leveraging diverse group of minds/experiences/skills. In a healthy environment, such experience may be even bonding for the team, as long as ranks and seniority are left at the door (which is
not easy).
Just clearly write out the scope and purpose, timebox it, and collect/record the ideas, no judgement, not even attribution. Then the next time, see if anything converges, evaluate what can be done.