The EverQuest website has the news on a new expansion for the venerable MMORPG, saying this will be released on October 1st, following the release of the game's September update, which is expected next week (thanks Ten Ton Hammer). Here's a bit on the plan:

We are excited to announce we have an expansion on the way – that’s right, expansion – not “campaign.” As we’ve been toiling away this year, the content we’ve been working on evolved and grew more than we expected.

We wanted this expansion to have content that reached beyond the highest-level players. So, in addition to new and updated zones for levels 105, we are including two instanced raid zones for levels 75 to 105 to play in together! These “level agnostic” raid zones will balance themselves to the highest level player in your raid. It just so happens that these two level agnostic zones are the original Plane of Fear and Plane of Hate! So if you never got a chance to raid in those planes, or long for them, you can relive those days with a broader range of players when we launch.

This expansion includes over 15 raids – after getting feedback for more raids over last year’s expansion – and a ton of level-scaling missions and Heroic Adventures! And as with previous releases, there will be new AAs, spells, and gear. The story is innovative and impacts gameplay in interesting ways too.

In addition, if you purchase (or pre-order) the next expansion, you’ll also get access to ALL of the previous expansion content.