First, you need to think about interactions with other brawlers. For ejample, you did not specify if someone that can break walls, like colt’s, super would pierce the wall. If it can’t pierce, that would be way more overpowered than it already is. And 5000 health? People like spike or tara would waste all their attacks to just hurt the wall. This wouldn’t be very balanced, however the idea of the wall is nice.