Up until the last two sentences I was going to suggest a Captive/escort where it is an object instead of a person in a timed mission.
But yeah... the transformation thing would be super cool.
Neat idea, and it would actually really fit in an arc I am tinkering with now. Too bad it isn't going to happen. 
Justice Blues, Tech/Tank, Inv/SS
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Fighting The Future Trilogy
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/signed
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But what if you want to add a time limit, and a consequence, to NOT stopping the ritual?
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Consequences for failing a mission!?!?!?! What do you think this is?
Fun!
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...a transformation where the hostage is removed and an Enemy is placed. It can even be set Rogue, killing the enemy group that summons it.
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Those transformations (remove Entity-X and replace it with Entity-Y if Trigger-Z fired) I've wanted since the Devs declared they were thinking of MA, and not just for hostages in rituals, but for every and any NPC we can place!!
/signed in triplicates! 
I believe that a Kheldian Gold Standard should be based on SO's, and for anything above that... there's Platinum!
Save Ms. Liberty (#5349) � Augmenting Peacebringers � The Umbra Illuminati
Save Ms. Liberty (#5349) � Augmenting Peacebringers � The Umbra Illuminati
Here's a suggestion of something that could be added to great benefit...
Rituals, as in Disrupt the Ritual, can currently be placed by just creating a basic Release a Captive, or if you want to be trickier, Add an Ally or Add an Escort. Add an appropriate Enemy animation and an appropriate Captured animation, and call it a day.
But what if you want to add a time limit, and a consequence, to NOT stopping the ritual? For instance-- those poor souls captured by the Vhazilok and transformed into Eidolons... wouldn't it be fun to see that happen, and have it seriously hurt the mission?
What I propose is a Ritual objective that behaves much like an Escort, but allows the architect to set a time limit to rescue the hostage(s), what event triggers the timer, and a transformation where the hostage is removed and an Enemy is placed. It can even be set Rogue, killing the enemy group that summons it.