I'm interested as to why this is now being brought up. The arrival of the deadman switch pretty much made Serenity's death or capture certain if not close. Even if the Titans defeated Jack without blowing Serenity to sky high how would they disarm the vest? I'm thinking that the only way Serenity makes it out of this alive is if she is captured, or if one of the Titans offers themselves up as a trade, but only if Jack disarms the bomb.