DnD One Shot

The PCs are evil spellcasters who must survive a tavern crawl. It might involve demons.
There is an infamous local who wants to do the same thing.
The characters start at a burning tavern. Early on they meet an old foe. If things get stuck someone revealed as a shapeshifter.
At the end there is one character narrating about all of the others.

The PCs are all shapechangers who must discover the plans of a mutant sphinx. It might involve goblinoids.
There is a dangerous merchant who betrays them partway through.
The characters start on the road about to encounter someone. Early on there is a big fight scene. If things slow down a statue points them somewhere useful.
Afterwards there is a newborn or child on the way.

The PCs are good soldiers who must escape from a sacred palace. It might involve bullywugs.
There is a religious apprentice who has important information for them. they are the aunt of a character.
The characters start in tense negotiations. Early on they encounter a new potential ally. If things are going nowhere a storm approaches.
Afterwards there is a newborn or child on the way.

The PCs are all different monsters brought together by unusual circumstances who must survive an attack by dragons. It might involve demons.
There is an attractive priest who tries to help them.
The characters start on a sinking vessel. Partway through they spot foes who are unaware of them. If things get stuck something starts following the group.
At the end there is a family gathering.

The PCs are fugitive hermits who must explore a magnificent wizard's tower. It might involve elemental air.
There is an angry servant who turns out to be the villain.
The characters start outside some ruins. Early on there is a big fight scene. If things slow down it starts to rain.
Afterwards there is someone imprisoned.