Ive been thinking about this one!! So Lars or Gro should read the list and BOOK THEM ALL!!!Sturmgeist: Baltempest can inform you all that Sturmgeist are fucking awesome, and rather fun live! Also considering Cornelius is from Oslo, maybe he'll wanna play his home town!
Krypt: Norwegian, underground signed too a small label and not that well know really, perfect for the John Dee...
Mercyful Fate/King Diamond: I dont care which but either would be fucking awesome to headline any night.
Trollfest: Fuck all this Finntroll talk! Lets have the Norwegian version who mainly sing about trolls and drinking!
Naglfar: They would be greats of the Norwegian black metal scene... if they weren't Swedish! A must for next year in my opinion.
Setherial: More Swedish black metal and once again all purely satanic, theres or the above (Naglfar) would be fine.
Bal Sagoth: A bit out of place if they played next year but they very rarely do anything and when they do its usually only in Germany and there has to be an English band at Inferno once again.
Catamenia: Some melodic black metal from Finland, think like COF but with talent!
Illnath: More melodic black metal in the same vain as Catamenia but from Denmark this time, haven't toured since 2003 despite being an active band!
Taake/Ragnarok: Well why not? If Hoest isn't in prison its best to make use of one of his bands! Maybe even both 
The Monolith DeathCult: We need some death metal and why not these Dutch guys? Fantastic metal from a bunch of very tounge in cheek guys!
Rotting Christ: FOR FUCKS SAKE JUST BOOK THEM!!!!!!!!!!!!!!!
Ancient: After a bit of a break due to not having enough members they have recruited Morfeus (Limbonic Art) and are finally ready to carry on. Being Norwegian they should play Inferno!
Thronar: Battle Metal, but imagine if you will a combination of Bal Sagoth and Amon Amarth and thats what you would be getting from these Dutch guys.
Impaled Nazarene: You cant go wrong with some punky nuclear holocaust music now can you?
Baratharum: More Finnish black metal, but a band that released an album with THREE bassists needs to play Inferno! They have also only played outside their home country twice (Sweden & Russia).
Vulture Industries: Great candidates for an opening slot on the Rockefeller, basically they could very well be the next Arcturus.
Troll/The Kovenant: Stian needs to get up off his arse and do something live as he last played live at Inferno in 2003 and as The Kovenant have new material and Troll have a full band lineup now I feel he should get up off his arse and do something!
LONG SHOTS:
Absu: Black thrash gods, have reformed with a full lineup and have a new album. If they are willing to play live lets have Inferno as a comeback show!
Limbonic Art: Maybe they dont wanna do the live thing again, but its well worth having a go at getting them back onto the gigging scene!
Sabbat (JAPAN): The last two Inferno's ive met Japanese people and had my picture taken with them, so we need some more Japanese bands at the festival and Venom loving Sabbat would be ideal!
Kroda: Not nazi's despite what people say but with Negura Bunget going down so well Kroda would be even better!
Arkona: Russian Pagan Metal, much like Kroda & Negura Bunget. Infact they would compliment Kroda perfectly!