Disable outlines  

Disables the black outlines around and on the characters for a cleaner look. Also disables the white glow effect on the characters that's visible only in the character select screen and the heroes menu.

Looks like it disables enemy outlines as well but you can still tell who's the enemy because of the huge and colored nameplates and health bars lol.

Installation

• Go to wherever you have the game installed and navigate to the Paks folder. For example: \SteamLibrary\steamapps\common\MarvelRivals\MarvelGame\Marvel\Content\Paks
• Make a folder in there named "~mods"
• Download the mod. You should get a zip file.
• Extract the archive and drop the zNoOutlines_P.pak file in there. 
• In the end it should look like this: \SteamLibrary\steamapps\common\MarvelRivals\MarvelGame\Marvel\Content\Paks\~mods\zNoOutlines_P.pak