Oh, if someone writes a Merlin/Harry Potter crossover, it would be AMAZING. Preferably someone from this fandom, though... there's too much crap that gets written in the Potter fandom, and I have yet to see bad!fic here.

I can so imagine Hermione's reaction *skits*
Hermione: We're looking for Merlin, we really need the help of someone old and wise, especially now Dumbledore's dead. For some reason, the library just didn't have what we needed!
Harry: Calm down, Hermione. *turns to Merlin* So, do you know where we could find him?
Arthur *very confused*: Do they mean you?
Merlin: ...
Hermione: Yes, of course we mean... wait, what?
Merlin: Err, nice to meet you?
Harry, Ron and Hermione: ...

Oh bugger.
And they should.