I would like you to present an idea. We all know that one week per month, women have their period. Why wouldn't you introduce that, one week per month, players are unable to pick female heroes because they have their period.
Also for each new hero to come, you could change the stomach of gilrls heroes and says the new hero will be her baby. For example, Lina model becomes pregnant and then a new hero is released, and she comes back to normal.
Current solo rating: 4015 | Current team rating: 4177