EQ2 was great, but was not meant for those with low-end PCs when it was released. They claimed it gave people room to grow as PC hardware improved. I don't know if this is what kept it from EQ1 levels of success but at least they are addressing it.
Garryk's forum posts
There's a ton of movie trailers that have the exact same dramatic music because the companies that are hired to make the trailers own the rights to the songs. Same two companies probably made the Avatar and SC2 trailers.