I think a small rivalry between Varus and Jax would be a cool concept to explore in futures V(G)Us

Varus probably hates Icathians with a passion, especially considering they killed his family, his town and released the void which maddened him.

Jax was practically the 'general' of Icathia from what we know, so it would make sense he would lead a mission to west Shurima.

We know Varus' entire home was destroyed by Icathians and that he has an undying hatred for them, so maybe they even saw each-other during battle?