Well, I think Plummer actually deserved a trip to the Pro Bowl. He was just unfortunate this year there were 3 other players who were voted ahead of him. The AFC had a extra strong QB class this year and that cost Plummer, he deffinately put up Pro Bowl numbers.
Also, bare in mind that the Jake Plummer is not replacing Tom Brady.
The AFC QBs voted in were Peyton Manning, Carson Palmer, and Tom Brady.
When Carson Palmer went down with a knee injury, the first alternet is to take his place. The first alternate was QB Drew Brees, who injured his shoulder at the end of the regular season-so he's out. So, the 2nd alternate (next highest vote recieving QB) takes Palmer's place, thats Jake Plummer. So, Plummer is actually replacing Carson Palmer. This has been known now for about 3 weeks.
All of a sudden, it comes out in the news that Tom Brady (who has had shoulder and shin problems all year) is hurt and won't play. So, the 3rd alternate (Trent Green) takes his place.
So, Plummer replaced Palmer and Green replaced Brady.
So, I think you could make the arguement that Green has no place being there (because he doesn't) while Plummer does. At the end of the season there were 5 AFC QBs very deserving of the Pro Bowl but only 3 get to go. Trent Green is not one of those 5.