It would be a way to look at the predictive power of the team average Elo.
I would love to see this just for the recent Iron Banner event. (But it would be interesting for other game types as well.)
If you were willing to share the data, I'd be happy to process & plot it and share it back with you. The raw source data is really simple: 3 columns: Alpha Elo, Bravo Elo, and which team won. One row per Iron Banner match. It might add more interest to include a 4th column, which is the datetimestamp of the match.
You'd think that when the Elo spread is zero, then the win rate for Alpha would be 50%, and it would go up/down as the Elo spread went up/down. But how much? What are the odds of winning if the Elo spread is 100? 200?
Another analysis that would be interesting would be scoring vs Elo.
What do y'all think?