I plan on getting the new November's Doom. It's been getting tons of good reviews. 2005 releases I've bought so far is Evergrey's live double and that one rocks. James LaBrie's Elements of Persuation solo album. Really good and Mike Mangini is on drums (world's fastest drummer). It's not crazy heavy, but it's good for prog fans.
For 2005, I will await a new Celtic Frost album, which is in the works. It will be somewhat along the lines of To Mega Therion. It will be raw, harsh, and experimental.
A new Dream Theater album is coming out in a few weeks. I'm waiting, but I'm also prepared to be disappointed, as many were for the utterly boring and one-demensional Train of Thought album.