There's nothing wrong with posting a series of vignettes. Sometimes the joy of a story is in a certain phrasing or the way it makes you feel.
Even if you do write something else later that these vignettes would fit with, they're your stories - there's nothing that says you can't cannibalize them for use again.
If you have it written and you want to share I say go for it!
Lois: You know, I have a funny feeling that you didn't tell me your biggest secret.
Clark: Well, just to put your little mind at ease, Lois, you're right.
Ides of Metropolis
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