Hunter Artifact Scenario Spoilers from WoWHead:
http://www.wowhead.com/news=249811/legi ... ide#hunter
(Waiting for Beast Master Scenario. Also nearly all other Artifact Scenarios have been datamined too on the page.)
Legacy of the Windrunners: Marksmanship Artifact Scenario
-The Rescue
 Survey the rise ahead and elminate Legion patrols.
-Stop the Summoners
 Defeat the eredar summoners before they bring in more demons.
-Search for Your Allies
 Go deeper into Legion territory and try to locate Alleria and Orestes.
-Defeat the Hound Mistress
 Slay Mistress Torvis and her fel hounds, then resume the hunt for Alleria
-Silence the Herald
 Defeat Herald Xarbizuld.
-Enter the Cathedral
 Enter the Cathedral of the Inquisition.
-Free Vereesa Windrunner
 Slay D'zorykx the Trapper to free Vereesa.
-End the Inquisition
 Defeat High Inquisitor Qormaladon.
-A Bow of Legend
 Wield Thas'dorah, Legacy of the Windrunners.
The Spear in the Shadow: Survival Artifact Scenario
-Landing
 Wuho should have located a good spot to start. Wait for his signal, then regroup at the landing site.
-The Haunted Harbor
 Kvaldir wards bar the way further into the swamp. Investigate Tideskorn Harbor to find a way through.
-Distracting Them Wisely
 The Mist Warders manage the wards. Use a Freezing Trap to easily steal their wardstones.
-Easy Pickings
 Steal the Wardstone now that the Warder is taken care of.
-Just a Few More
 More wardstones will be needed to breach the wall. Collect more wardstones from the kvaldir in the harbor.
-The Wall of Fog
 Apata and Wuho are out near the wards, find them and find a way to breach the wards.
-Into the Mists
 Harpoons and runes in hand, the fog barrier can be breached. Use a harpoon to cross the wards.
-The Shallows of Death
 Apata wants to get the lay of the land carefully, follow her around the swamp.
-Deadly Shadows
 Dakaar is sending illusionary stalkers at you, defend yourself!
-The Hunter or the Hunted
 Dakarr hides in deep mists, go into them and lay traps to catch him.
-For the Fallen
 The beast has fled to another lair of mist, trap it again and avenge Wuho.
-The Lair of the Beast
 Dakarr has fled to his true lair, but is too weak to hide behind fog. Finish him in his lair.
-The Spear of the Highmountain
 The foul beast is dead and the path to the Spear is open. Take up the Spear.