so for next year...

I think Manowar would be great along with some if not all of the following:

Hammerfall
Running Wild
Primal Fear
Lost Horizon
Savatage
Dream Evil
Rhapsody
Gamma Ray

I'd also like to see Nightwish, Blaze and Edguy return but I'm sure thats unlikely to happen.
 
I do agree the irish band we seem to get each year (at least from 02) would be a shame to loose, theres some links to other irish celtic metal bands on the unnoficial waylander site, also mourning beloveth may fit