This reuses an existing map for The Unknown:
Code:
<ImageStyle Name="exp22_dun_unknown_raid_01" displayname="The Unknown: Abyssal Behest [Raid]" zonerect="-1616, -1436, 2470, 1542">
<ImageFrame Source="images/maps/map_exp22_rgn_unknown.dds" SourceRect="0,0,800,600"/>
</ImageStyle>