Would be a great matchup. If Glover can steamroll through Rampage like I and a few others think he can then who does Glover fight after Rampage? Does Glover sit on his hands and wait for the winner of Jones (or Hendo)/Machida?
Not every fighter can separate the lines between training partner/friend and opponent. I know this is going to turn into another thread about "Oh, these guys are right. The others are pussies because they won't fight each other." The UFC does not have the right to force the issue and blur the lines themselves, nor do the fans. The decision remains with the fighters.
You could spin this another way. If Machida's father is fine with Lyoto fighting Glover, then what of Anderson Silva. What one has to take into account is that Lyoto and Anderson already know what would happen were one to fight the other --- we do not.