Author's Note - I do not own any of the characters, this scene just came into my mind when I heard what was supposed to happen in Army of Ghosts and Doomsday. Everything below but the notion belongs to the BBC.
It was all going to Hell in a handbasket. The Daleks and the Cybermen were going to conquer the Earth and then fight each other for dominance.
A memory rose to answer the hopeless feeling engulfing Rose Tyler. She had bowed her head, perhaps in prayer, perhaps in despair, perhaps both. Suddenly, she jerked up. For a moment, she looked to where her mother was valiantly fighting, to where the Doctor was on the verge of using one of his precious remaining lives in a futile effort to save her world, then without a tear in her eyes let the memory flood her.
The Bad Wolf filled Rose once more; she began to glow as she calmly dispatched her enemies. As she kept her mother, her world, her Doctor, safe.
Dimly, she was aware of Jackie's screams of shock and fear to see her daughter changed and of the Doctor's protest that she could not do this, but none of that mattered.
When the last enemy fell and the Doctor started to come toward her, Rose shoved him away in a burst of power. It did not hurt him, just stopped him. She was burning, collapsing. The ground rushed up to meet her as the golden fire exited her now frail body.
Somewhere, she heard the crack of the Doctor being slapped for the second time in nine hundred years' time by someone's mother and him saying he was so sorry. Seemed like he said that a lot nowadays, almost as much as he once said "fantastic."
Was this death?
"Come 'ere. I think- I think a Doctor needs you," a Northern accent choked out, his familiar, beloved voice heavy with feeling.
"Doctor?" Rose whispered. All around them was light. She looked around and could see the Doctor, the other one, arguing with Jackie while standing over a pitiful husk that used to be her. None of that was important.
All that mattered now was the dodgy faced, grinning man standing before her, holding his hand out.
Gladly, she took it, then leaned over to kiss him.
"Fantastic."