The way I see it, if that happened then it's not doom and gloom. You never know if the player would want to move. If they did, you have a bargaining chip. Maybe there would have a talented player that we want, then we have something to talk about.
I don't think we as fans take too kindly to our stars going before time, if at all, tbh.
There's a significant risk that an Iberian is going to pack his bags the moment Real or Barca show an interest. That may put us off that avenue (if any single thing would).
Martinez looks the business and he's clearly a better player than Rodwell at the moment, but if we're going to put our eggs in a particular basket, I reckon we'd take Rodwell over him.