pretty much, If i had an old general advertising campaign in place, does it adapt to include advertising for my new routes that I make? or do general campaigns have no effect on routes...
Route image depends from route campaings, and flying the route.
Company image depends on company campaigns, and other factors as size, international flights, flight reliability, etc...
But a better company image will help you having more passengers, especially if you increase the ticket prices on that route. Not sure if it was your question though.
that answered it, my company add campaigns do not directly effect my route LF, but they do help in a secondary way. So it doesn't matter if i've opened new routes since i started the company campaign because it only effects my company as a whole anyway