It could be a simple warning. Maybe there's a structural issue with the bridge in the fanfic's version of the 'Age of Ultron' world. Wanda, with her powers, might have sensed it and is telling people to get off.
Well, in a fanfic based on 'Age of Ultron' when Wanda says 'Get off the bridge', it could be a moment that is completely different from the movie. It could be that the bridge in the fanfic is a symbol of a crossroads in the story. Wanda's words could be the catalyst for a major plot twist. Maybe there is a hidden enemy on the bridge, or it could be that the bridge is about to be destroyed, and her words are the start of a rescue or escape sequence.
One possible fanfic could be where Wanda is on the bridge during a chaotic battle in 'Age of Ultron'. As she stands there, she realizes the danger she's in and decides to get off. She uses her powers to create a distraction among the enemy forces and then quickly makes her escape. Maybe she levitates herself down to safety, all while the battle rages on above her.
It could be about Wanda having to make a quick escape from the bridge during the events of Age of Ultron. Maybe she's being chased by Ultron's minions and has to use her powers in a new and creative way to get off the bridge safely.
You might try fanfic websites like Archive of Our Own (AO3) or Fanfiction.net. Just search for 'Age of Ultron Run Get Off the Bridge Wanda' on their search bars, and you may find the fanfic you're looking for.
One idea could be that a hero is injured on the bridge during the Age of Ultron chaos and has to run to get off the bridge to find medical help. This would add a sense of urgency and vulnerability to the character.
Well, a fanfic about this could be really exciting. Maybe it focuses on a character's decision to 'get off the bridge' during a chaotic moment in the Age of Ultron. It could explore their motives, like if they're trying to avoid a big battle or save someone on the other side.
She could be in the middle of a psychic battle on the bridge. When she realizes she's losing control, she decides to get off the bridge to regroup. So she uses her telekinesis to push back the opposing forces briefly and then runs off the bridge. Once off, she finds a quiet place to regain her composure and strengthen her mental defenses for the next encounter.
One idea could be that a character is on the bridge and is ordered to get off because there's a bomb planted there by Ultron. As they start the Shield run, they face various obstacles like collapsing structures. Another idea is that the 'get off the bridge' is part of a trap set by a rogue Shield agent. During the run, the main character has to figure out who to trust among the Shield agents.
In this fanfic scenario, if we consider the 'get off the bridge' moment, it might be because the bridge is about to be destroyed or is in immediate danger. For the Shield run, it could be a coordinated effort by the Shield agents. They might be trying to escort someone important off the bridge. As for what could happen, perhaps there's a hidden enemy within the Shield ranks who tries to sabotage the run, adding an element of mystery and danger to the story.