Swap some champion...special interactions (if appropriate, to whom they're directed).

You know how these work.

"Did you know Karthus can catch another Draven's axes? Ha ha! You should read the hints more often!" "Four Jarvans, and you're all still failures! That is funny." "Trapped in a box for so long, Lucian! They never should have let us out."

If you need a primer: http://leagueoflegends.wikia.com/wiki/Easter_eggs/Special_Taunts