Request for high res figures: what should I be mindful of?
if you write a review with 5 figures from someone else, it's either a very long review, or you may simply not be the right person to write it, it seems to me.


Or you just think that person has amazing figures.  :-)

If the author's university and the journal publishing the review are both reputable, then I doubt you have much to worry about.  If they aren't, then it is more worrisome.  If the author hasn't already specified where the review article has been submitted, then that's strange in itself, although it could be awkwardness rather than dishonesty.

There seem to be two issues here:


Will it be a mediocre review article?  There's not much you can do about this: you presumably can't stop the article from being published, so the only question is whether the world would be better off if it didn't include your figures.  (That outcome would be worse for you, and I can't see why it would be better for the rest of the world, so I'd be inclined to give them the figures.)
Is there no actual review article, and this is just a setup to get copies of your files for use in plagiarism?  It would seem crazy to draw your attention if there's plagiarism involved, but sometimes people are crazy (or it could be someone using a fake address or hacked account).  I wouldn't worry about this too much: the chances of plagiarism are not so high, and the chances the plagiarizer will actually get away with it are even lower.  Besides, you might end up with an amusing story about the time a plagiarizer asked you for copies of your figures.



  Remind him that he needs copyright permission from my papers' publishers, in addition to my files.


Definitely, and you could even cc the permissions e-mail addresses for your publishers, to help speed the process along and make sure the author doesn't forget or lie about it.