How about something to mess with our enemy's head's (assuming they are not reading this thread. or playing alts.)

• The Eldar Gods Crusade
• Mensha Khaine' Crusade
• The Crusade of the Great Waaagh
• The Thousand Alpharius March

Or for the straightforward ideas:

• The March of Skulls
• My Big Fat Chaos Crusade
• The Harbingers of the Metalocalypse
• The Homecoming of Angels
• The Great Irkin Crusade
• Operation Impending Doom III
• The Soul Harvest

Of the ones already suggested I'm personally a fan of:

• Crusade of Unending Doom (Erobar Lord of Change)
• Eternal Crusade (Tyryt)
• The Reaping Crusade (Chaplain Valerius)
• The Hidden Crusade (Chaplain Valerius)
• The Sundering (Imotekh the Harbringer)
• Last Children's Crusade (Vox de Vacuo)

i prefer just The Reaping, but nice list anyway.

now that i think about it, it sounds very....crony...maybe even a little nidy too..

Eternal Crusade

Strangely fitting...

Black Crusade 14: Crusade Harder

This'll be our crusade name if we have an entire War Council that's made up of Abaddons.

Only to the victors go the spoils of war...

This is the black sun crusade
for as we march to the seat of the falsh god we shall engulf the suns of countless planets in the name of CHAOS!!

Torturesade!

Failed-crusade, oh wait you already used that for your other crusades