Join Date: May 2009
Location: South Carolina, USA
Ork vs necron doesn't have much appeal to me since I doubt orks would really find fighting soul-less things that are immune to fear, cannot be 'beaten' in a sense of combat prowess, and don't bleed really interesting to fight.
But your second concept has merit in a sense. I would be interested in playing a member of a Grey Knight purge team sent to handle the tainted wreck of the ship spat from the warp that had been exposed to the corrupt Tides without protection of its Gellar fields.
Although, I am somewhat confused as to how a Navigator sent a message instead of an Astropath (who would typically be sealed in a warded and self contained room with his/her choir and sometimes sedated to keep from being possibly tainted in the trip through the warp), unless you are talking about his/her death scream echoing in the emperian.