Of course there was no closure. The future for them held no happily ever after, to go home was to lose what they had. Steve couldn't ask Tony not to do it, not to leave him. But he could hope that God would take them both together, rather than leaving Steve alone once more. But those were thoughts for later, things to turn over in his head and never say out loud because it would only cause more hurt.
And maybe, maybe they could just stay in the present.
Steve leaned back on his hands as he watched Tony go toward the hammer, reaching for it and honestly he was surprised it didn't shift. He'd been surprised he couldn't lift it last time he'd tried too. "Ask away," Steve said said with a little shrug.