I had an issue with this in World of Warcraft, it seemed like they were systematically making every cool character from the original universe and making them a raid boss to be killed off in the "story". Granted its not really an issue because story wasnt exactly prevalent in World of Warcraft and I really doubt half the community even knew Warcraft had a story line to it but it seems to be catching on. The Old Republic is going to be a MMO that has 200+ hours of storyline in it and is very centered on story telling as you can imagine. the strangest thing though is that they seem to be going to World of Warcraft way of story telling, you killed off a main character so your awesome.
You can find most of this information through leak websites and the actual SWTOR forums.
In the old republic they revive 3 main characters, who are Revan, HK-47, and the exile, and make them mid level bosses to kill off. these are established characters from both Kotor 1 and 2 and they make surprise guest appearances so you can feel like your character is great. I personally dont get why Bioware would do this, they make characters that were supposedly legends through out history and say "you killed revan, you and about 5 million other people are better then him now" which is a mystery to me. they then go to make level 50 instances kill off most of the TOR established characters. The final insult the the whole story tellign process is that the only level 50 raid is not about infiltrating the enemy faction's base and assassinating their leader, you probably already did that, it is about killing a character no one knows or cares about.
You can find most of this information through leak websites and the actual SWTOR forums.