Team Builder Rivalires

I have built multiple custom teams and have put them inside of the same conference to make sure they play each other but there are no options to actual make them rivals, can we fix this?!?!

I get no making it not an option when you are making the teams off the bat but there should be at least some way to create a rival, because as of right now I need to make sure to go into there schedules each year to make sure they face each other and I don't get to see anything come out of it, and this would also be a great opportunity to force a white out or something in relation to build the hype of the rival game.

As of right now it's a pain to do this every year and to see not stats from the matchups and this is only when i have 3 teams, what if i wanted to put in more? Overall i think there should be a way to select rivals before a start of a season and the game from then on out makes sure the rivals play each other and saves stats along with custom actions to make the teams feel like a real rival.