If you loved Hellboy: The Golden Army, cherish your memories. Guillermo del Toro says that there won't be a third Hellboy for years... but that's not to say there won't be a Hellboy sequel earlier.
Talking to MTV, the incredibly busy del Toro said that it'll be some time before we see a third Hellboy movie:
We’re three, four years away from anything happening—so I don’t think anyone is, you know, in a big hurry.
However, he did reveal that he'll happily step aside for another director helming a BPRD movie, focusing on the Bureau of Paranormal Research and Defense that (spoilers) Hellboy, Liz and Abe all quit at the end of The Golden Army. Whether or not Universal Studios think there's enough profit in a spin-off from the franchise without del Toro's involvement is open to question - they had to be convinced to make Hellboy II, after all - but I'd love to see what a BPRD movie could be like... as long as we get some Ben Daimio out of the whole deal.
‘Hellboy 3′ Three Or Four Years Away, Says Guillermo Del Toro [MTV Splash Page]