There's been rumors for a few years now that berserk season 2 would be produced...none of them are ever, ever true unfortunatly. A huge problem is that Berserk really isn't too close to being finished yet. The storyline directly after the eclipse (The Lost Children Arc) isnt all that interesting, and doesn't have much character development. It's basically Guts hacking everything in his path to bits. They would also have to spend time explaining what exactly happened at the eclipse, how Guts and Caska were saved by Skullknight, how rickert survived the apostle attack etc, plus they would also have to make absolutly sure to tell the legend of gasairic, which they skipped over around episode 20. Without this, the world of Berserk isn't nearly as interesting or intriguing. All of these would definetly look great in anime form, but it would take so much time. It's just one of those things that really has no filler manga episodes. Every weird conversation and scene, are eventually important.
After all of which I just said, again there isn't any closure at all. If they animated that part of the series, they would have to animate the following part,(the rebirth arc) which is one of the most interesting and dynamic parts of the series so far, and would basically need a season or more of its own to be told right. It's just so long and so thick with development, story, insights...its quite awesome.
If anyone is seriously interested in this series, check out the FAQ on skullknight.net
Also check around the other parts of the site...it has just about every teensy little fact about Berserk, plus tons of great speculation for the future of the series. The BBS is pretty bomb too, since there are constant updates on the manga issues as they come out in japan.
While I personally would love to see more berserk anime, I'd be disapointed and pissed if it was rushed and done poorly. It would need around 2 + seasons just to catch up to the manga, and who knows how much more after that.
Can you tell how much I love this series?
