DEFINITELY OUT - Touring, not touring, breaking up, etc :)
Aftertime - touring
Alkaloid - members touring with other bands
Allegaeon - touring
Amaranthe - touring
Amorphis - touring
At The Gates - Touring
Atlas Pain - share a member with Sojourner so rules them out too
Batushka - in-fighting between band members
Behemoth - Touring
Bon Jovi - Jon doing two cruises of his own
Brainstorm - Touring
Burning Witches - touring with Gravedigger
Candlemass - Touring with Ghost
Chris Bowes - Alestorm have a gig on 6th Feb in Perth, Western Australia
Corrosion Of Conformity - Touring
Crimfall - calling it quits
Cripper - quitting after this June
Crowbar - Touring
Dark Moor - Touring
Decapitated - Touring
Dee Snider - Touring Australia
Deicide - dates in Florida
Draconian - Touring Europe
Fallujah - Touring
Follow the Cipher - Touring with Amaranthe
Ghost - Touring with Candlemass
Ghoul - Touring
Gloryful - Touring with Brainstorm and Mob Rules
Grailknights - Touring :(
Gravedigger - touring
Haken - Touring
Hallatar - Ruled out as Tomi touring with Amorphis
Harakiri for the Sky - Touring Europe with Draconian
High on Fire - Touring
Imperial Age - touring
Jinjer - touring
Judas Priest - touring with Ozzy
Katatonia - contemplating their navels instead of doing band stuff
Kvelertak - touring with Mastodon
Marty Friedman - Touring
Mastodon - touring with Kvelertak
Mob Rules - Touring with Brainstorm and Gloryful
Mothership - Touring
Mutoid Man - touring with Mastodon
Nailed to Obscurity - touring
Necrot - Touring
Nightwish - not doing any shows in 2019 as working on new album
Overkill - touring
Ozzy Osbourne - touring with Judas Priest.
MGLA - not doing anything until March.
Morgoth - inactive until further notice due to differences and stuff
Serenity - lead singer probably the lead singer of Warkings, who are touring with Amaranthe
Slash - touring Australia

Sleep - out because High On Fire are touring
Soilwork - touring
Sojourner - touring Europe with Draconian
Tankard - touring
The Privateer - dates during cruise
Thulcandra - members touring with other bands
U.D.O. - touring
Venom Inc. - touring
Vuur - Anneke has solo dates during cruise
Warkings - touring with Amaranthe and Follow The Cipher
Watain - touring
WeedEater - touring
Wisdom - taking a break
Wolves in the Throne Room - Touring
OUT? - only because so-and-so said so, or maybe they are recording
Avantasia - Tobi says no
Battlelore - Razor said so
Devin Townsend - Devy says no
Dread Crew of Oddwood - Europe tour starting 7th Feb
Epica - Mark Jansen says not this edition
Hammerfall - Oscar says no
Kissin' Dynamite - current tour finishes in Strasbourg on 29th Jan. A tight squeeze to get from there to 70k.
Powerwolf - current tour finishes in Strasbourg on 29th Jan. A tight squeeze to get from there to 70k.
OUT? - only because of band member losses
Huntress - Lead singer has passed away :(
Manilla Road - death of key member :(
Oceans of Slumber - lost two members recently
Therion - Linnea has left the band, Thomas is doing other things for a while
OUT? - All bands from MORC 2019 (dates are 3 weeks after 70K, so cannot rule them out completely) including:
DAD
Danger Danger
Extreme
King's X
Pink Cream 69
Queensryche
Saxon
Skid Row
OUT - Any bands announced for Shiprocked 2019 (as it returns the day 70k sails)
OUT - Any bands announced for Full Metal Cruise:
Backyard Babies
Dio Legacy
Iron Savior
Omnium Gatherum
Savage Messiah
Steel Panther
The Wild
Tri State Corner
Ugly Kid Joe
OUT - Any bands doing Megacruise:
Anthrax
Armored Saint
Beasto Blanco
Corrosion of Conformity
Danko Jones
Devil Driver
Dragonforce
Doro
John 5
Megadeth
Metal Church (were on 2018 anyway)
Metalachi
Overkill
Phil Campbell and the Bastard Sons
Testament
OUT - All bands from 70k 2018 (because, that's the way it is, baby)