I have not preordered, but may end up purchasing the game on one of my weak moments however, I cannot quite simply see this game reaching the expectations of all those hyping it up.
We have seen it time and time again, release after release of mmo's breaking into the market and in one way or another they just do not last. In terms of gameplay/graphics/story SWTOR ticks a load of boxes compared to those mmo's of the past but the only box I see which will be its problem is in fact the sci-fi/star wars aspect of what the game is. What I mean is, by going down the sci-fi road your are (imo) limiting yourself to that kind of fanbase. I am fully aware that StarWars is and has been a massive name but will it work in an mmo environment? Will it pull all of those wow subs over to it?
I just canot see it due to how different a setting both games are.
WoW played on a lot of players fantasies and gave us something no one had really given us before (big list not going into it).
In terms of being succesful will SWOTR do well, well yes ofc but imo it just wont succeed as well as a lot of people in this thread are saying, those people are being a bit biased to there personal feelings and not looking at the bigger picture tbh.
Btw I love wow, played for 6 years, consider myself a 'loyal' player but cannot see it losing a massive load of subs (initally maybe, but wont last) to SWOTR for the reasons above however I can see WoW losing a lot of subs to a certain GW2 that is fast approaching as its hitting the same playerbase that play wow.
Good luck to SWOTR I'm sure the sci-fi fans here will have a great game to play when its released and also give those who want to sub to two mmo's a good second game to play too