I love Berserk but they would have to completely redo the series if they continue it. The manga is slightly different in the events that happen and it has characters that were missing in the animated series.
Sadly I dont think that they would ever re-animate Berserk, its one of those things that I will believe when I see it actually happen.
Edit: OMG its really happening!! I thought it was a fake at first but it doesnt look like it is!!