Maybe not, but the Average-Joe American passerby (pun unintended
) Pokemon fan may not realise that there have been premiered episodes outside of the US, and complain about how your site is messed up. (Since the majority of the Pokemon fanbase are in no more than 14, this is probably more likely than you'd be lead to believe.)
Besides, it's not like it'll be taking up much more space, just what the Chronicles takes up, and a picture a week won't wreck your bandwith forever surely?
Obviously, I can't tell you how to run your own successful site and such, but since Toonami won't be releasing episode guides or synopses (what's on their webpage goes to the Sky guide - "Ash, May and Brock continue their journey through Hoenn"), so unless you write a nice kind letter, and provided they don't delete it on arrival wihtout reading it, episode titles will only be revealed on the day of the episode, and I'm not sure you'd want to update every Mon-Wed with an episode title.
Sorry if this seems a bit much... I'm just a bit passionate about this sort of thing, as you can tell