I mean, they’ll almost definitely save Iris herself, since she’s an integral part of Barry Allen’s life, but as the prophecy has it, something will go horribly wrong for someone because of all this.
I love the way that trailer ends, with the countdown leading into a complete fade-out, rather than something explosive.
That’s the kind of ominous detail that makes one think that Team Flash might not be so completely successful in its mission to save Iris from being murdered by Savitar.