If Natasha was in Siberia, she wouldn’t be rescuing Tony
Prop-Tony writers keep sending random people to Siberia to "rescue" Tony from his attempt to murder Bucky Barnes. This time it's the Black Widow. Considering how Tony treated her, why would Natasha be going anywhere to rescue HIM? Especially when he's the one who's assaulting Bucky and Steve. The writer of this gem also thinks the Sokovia Accords make sense, so that explains a lot.
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Tony sulked in his powered down suit. He exclaimed, "It's so cold. So incredibly, stupendously, amazingly cold. How DARE Cap leave me here to die! I'm too young and pretty to go to heaven."
Suddenly a voice said, "Your suit's heaters are still working. Steve needed to get Barnes away from you before you succeeded in killing him. And you're neither young, pretty, nor likely to end up in Heaven."
Tony turned to see Natasha walking forward. She stopped a few feet away and said, "So who exactly on the Accords panel gave you permission to be here?"
Tony scowled and said, "If you're just going to be annoying you can shut up right now."
Natasha crossed her arms and said, "No really, you went on and on about consequences and accountability. So you MUST have followed the Accords policies and gotten clearance to violate all those countries' airspaces on your way here."
Tony stood up and said, "You're supposed to be MY friend, Romanov. You're supposed to rescue ME!"
Natasha lifted an eyebrow and said, "Maybe you should have remembered what good friends we supposedly are before you made that crack about me being a double agent."
She shifted and said, "I'm here for just one thing: Information. Where did Ross take the others?"
Tony sneered and said, "You mean Cap's little minions? Those losers can stay where Ross put them."
Natasha looked sad for a moment as she said, "I wish I could say I expected a different answer. I don't have time to rescue you, Tony. I'm going to help Steve rescue the rest of the team."
Tony shouted, "You can't just abandon me!"
Natasha shrugged and said, "Sure I can. Just watch me."
At the door, she turned back and said, "Hopefully a genius like you will notice the snowmobile sitting right outside the door. Or the Wakandan jet with the king and the REAL Vienna bomber sitting next to it. Have a nice life."