In an alternate ending where the infected and the humans form an uneasy alliance, the tone would be less about the fight between good and evil (humans vs infected) and more about coexistence. It would be a much less violent and more diplomatic tone. The story would then focus on how these two groups learn to live together, negotiate resources, and deal with their differences. This would be a major shift from the original tone of the '28 Weeks Later' which was mainly centered around survival against the infected.
If the alternate ending was a happy one where everyone was cured, the overall tone would change from dark and apocalyptic to hopeful and optimistic. It would be a complete shift from the sense of doom that pervades the original story.
Well, if the alternate ending had the virus mutate into something even more deadly but also made the humans more resistant in a strange way, the tone would become more complex. It would still be dark, but there would be an added layer of mystery and a strange kind of hope in the face of this new development. There would be a sense of the unknown and the fight for survival taking on a new form. This would change the tone from just a straightforward post - apocalyptic horror to a more thought - provoking and nuanced story.
One possible alternate ending could be that the main characters manage to find a hidden, untouched area where the virus has not spread. They start a new community there and figure out a way to immunize themselves against the virus using local plants or something unique to that area.
In the case of a new time - controlling hero emerging, it would introduce a whole new element to the story. The story would no longer be just about the existing heroes and Timetagger. It would expand the Miraculous universe by showing that there are other powerful forces out there. The new hero could bring new powers, new rules, and new storylines that could potentially lead to spin - offs or new arcs in the Miraculous franchise.
If the alternate ending is more positive, like Carrie using her powers for good, it can change the message from one of despair and the consequences of bullying to one of hope and redemption. It shows that even those who have been deeply wronged can rise above it and use their 'curse' as a 'blessing'.
If the Phantom is accepted by the public in an alternate ending, it would change the message to be about acceptance and the ability of society to look past physical differences. It would suggest that talent and a good heart can overcome prejudice, and that everyone has the potential to be part of a community if given the chance.
If the alternate ending is more positive, like the characters achieving victory over the bad guys, it can change the message from one of despair in the face of overwhelming odds to one of hope and the power of unity. It shows that even in the darkest of times, people can come together and make a difference.
In the case of 'Snow White', the original has a message about good triumphing over evil. But an alternate ending where the queen reforms herself and Snow White forgives her changes the message. It now emphasizes the power of forgiveness and redemption. It makes the story less about a simple battle between good and evil and more about the possibility of change and growth in people, even those who seem irredeemable at first.
It would be more of a story of hope and determination. Daenerys is on a journey to reclaim her family's throne. She faces many obstacles but always has hope. So the tone would be less bleak compared to the full 'Game of Thrones' which has multiple storylines full of despair and tragedy.
In an alternate ending where the Corpse Bride steps aside for Victoria, Victor's relationship with Victoria would be strengthened. He'd be grateful to the Corpse Bride for her selflessness. And the Corpse Bride's relationship with both of them would become more of a friendly, almost like a guardian angel type of relationship, where she watches over their happiness from afar.
In some fanfictions, if Harry doesn't defeat Voldemort through violence but rather through peaceful means like negotiation or magic - sharing, the theme of 'power through love and sacrifice' can change to 'power through understanding and unity'.
The overall tone would become more edgy and less festive. Usually, Christmas stories have a positive and warm tone, but a cursing father would disrupt that harmony. It might add a sense of realism, though, as real - life family situations can have their rough edges even during the holidays.