D&D One Shot

The PCs are novice dwarves who must survive a bear apocalypse. One or more characters has an inquisitive pet. It might involve kuo-toa.
There is an angry ruler who hates one of the characters.
The characters start at a burning tavern. Partway through foes are waiting for them. If things slow down there is an earthquake.
At the end there is the characters splitting up treasure.

The PCs are troubled animalfolk who must survive a rite of passage. The mood might be... manic
There is a loyal barbarian who turns out to be the villain.
The characters start in a chase scene. Partway through they encounter a guardian monster that hinders their progress. If things slow down something starts following the group.
It finishes with one of the characters dead or unconscious.

The PCs are rebel elves who must find a talking rod. A character is celebrating a special anniversary. It might involve zombies.
There is a dangerous druid who betrays them partway through.
The characters start during a heist. Early on there is a big fight scene. If things are going nowhere a villain turns up.
At the end there is a reward of a tavern.

The characters are all members of the same crime family who must capture a pious group of goblins. One or more characters are dressed in costumes.
It is at a dwarven island which is associated with a power of craft.
There are several bandits seeking a shapeshifting tiger. And a young dragon wants to track down some adventurers, the Breakers of Seatyde.
At some point they receive a useful sending.
As the adventure progresses people start breaking into song

The characters are fugitive elves who must defeat a celestial band of labourers. A character is undead.
It is at a shining demiplane which is touched by life magic.
There are a few talkative criminals initiating new members. And a repulsive druid seeks to complete a ritual in an elven shrine.
At some point a character learns something with a successful skill check.
As the adventure progresses people start dying in different ways