Try setting an EXE override to0140:fixme:powershell:wmain stub: L"powershell" L"-Command" L"Start-Process" L"MarvelRivals_Launcher.exe"
<path to game dir>/MarvelRivals_Launcher.exe (inserting the path to the game dir of course)0140:fixme:powershell:wmain stub: L"powershell" L"-Command" L"Start-Process" L"MarvelRivals_Launcher.exe" <path to game dir>/MarvelRivals_Launcher.exe