The rumored/reported Gundam esports title has been revealed as Gundam Evolution, a 6v6 Team-Based Shooter.
Also, a Japanese stream demonstrating the game was streamed recently. Here it is skipping to near the demonstration of the point capture mode:
There is a sign up for the closed beta test, but I think it's Japan only? https://gundamevolution.jp/cbt/
A Gundam hero-based shooter is such a good fit that I've never thought of before. While licensed Gundam games run the gamut in quality, watching footage of Gundam Evolution makes the game looks promising. It's been a while since I've seen any Overwatch so I don't know how it compares, but the team fights in the Gunam Evolution looks to be a fun mess.