D&D One Shot

The PCs are working for a secret society who must negotiate with an inquisitive winter wolf. It might involve winter.
There is a charismatic apprentice who hates one of the characters.
The characters start in tense negotiations. Early on they encounter local authorities. If things get stuck it starts to snow.
It finishes with the group all sharing a joke. Possible sequel... a foe returns more dangerous than before

The PCs are insane spies who must survive a bear apocalypse. One or more characters is currently cursed. It might involve water.
There is a friendly thief who sets them the quest.
The characters start in a fight. Early on they encounter a deadly trap. If things get stuck one of their allies tries to leave.
Afterwards there is a wedding. Possible sequel... an NPC from the adventure hires the characters for something totally different

The characters are mutant warriors who must escort a wagon through the wilderness. One or more characters has an inquisitive mount.
It is at a magical temple which is often home to spiders.
There are a family of thirsty lizardfolk worshipping many-eyed creatures. And a psychotic queen seeks to discover the plans of an inquisitive orc warchief.
At some point a character learns something with a successful skill check.
As the adventure progresses stars in the sky start to disappear

The PCs are cursed clerics who must take part in a tournament for adventurers. It might involve revenge.
There is a hedonistic noble who comes with them. they are the close relations of a character.
The characters start at a party that is disturbed. At some point there is a chase scene. If things get stuck it starts to snow.
At the end there is feasting in an inn. Possible sequel... a clue from a reward or treasure points to an infamous dungeon...

The PCs are egotistical paladins who must create a safe place for a mithril animal. The mood might be... deadly serious
There is a vengeful scout who betrays them partway through. they are the distant relation of a character.
The characters start camped and about to be attacked. At some point they encounter a magic circle. If things slow down one of their allies tries to leave.
It finishes with someone imprisoned.