So about the Champions LORE with Rivals, Friends, Family, and possibly lovers..?

What's the connection between some of these champions? We know that some people hate each other, love each other, or are family. Very, very briefly described in few lore's as an explanation as to why some may be on the rift.

For example..

Renekton and Nasus

Lucian and Thresh

J4 and Shyvanna

I want to have a clearer understanding between the way the act to each other or recognize others on the rift other than taunting. Who thinks they should add taunts to their actions like jinx, Vi, and Cait? Who in the hell has time to sit there and emote each other except for those on your own team? This make any sense to anybody? Not that they should get rid of taunts.. But add some more evident easter eggs?

This may come as great idea to start a franchise in RP, or have people really get into "Character". :)