I just gave a solution and you ignored it. If you're complaining about speedsters then you don't know much about the Flash, he runs at light speed and is a prominent member of the Justice League. his sonic boom would be no different than someone with wind powers and the ability to create hurricane force winds. I see more problems with the Hulk in a team setting than this since he can crush almost anything in sight if he loses control and he is a part of the Avengers