I know there are loads out there and I must investigate, but here are three short-but-sweet crosses all featuring Heroes greatest asset (Hiro!) to begin with:
An AU fixit for The Christmas Invasion, in which Hiro has better sense than the Doctor. If only he really had turned up…
And in this one, the Doctor sorts out Hiro. Sounds as though he finds the Heroes something of a nuisance in passing, which made me smile.
A lovely bittersweet little look at a mission that has to fail.