I hate to think we're relying on the Alchemist to return. He said he'd send us back, but I find it hard to believe he wouldn't spitefully go back on his word if this all fails.

[You can't expect not even a little bit of good faith on someone who kidnapped a bunch of people to tell them to kill each other! Truthfully, despite his job Katsuya is surprisingly naive about some things, but he's not so naive he'd expect the Alchemist to fulfill his promise like that]