I agree, the Crucible map thing I imagine wouldn't be too hard to do, the Strike map I can imagine as being planetside on the moon, fighting through the House of Exiles as you suggested, and ending up on a space station for a boss fight, the boss could be something predictable like an Archon, or a Servitor, OR it could be some sort of malfunctioning security AI that they turned on (Accidentaly or on purpose) and you defeat it, and you get some info on the Warminds afterward. Maybe.
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I would like to see more of the house of Exile by making the house of exiles base in the abandened space station. Also like you said and I think the warmind incorporation would be awsome. Like you are fighting a hoard of exiled and their archon when Rasputin comes and sets off a timed self Destuct that you have to escape before the station explodes