I just started looking at the map of Valoran, which has a link in the JoJ, here:
http://na.leagueoflegends.com/story/...january-21-cle

There are a few locations with absoulutely no lore behind them.

What do think Riot's plans are for these?

I believe I'm correct in saying these are the ones without any lore:
Fyrone Flats
Bubbling Bog
Tempest Flats
Howling Marsh

Let me know if any of these shouldn't be up here, or if there is something I missed.
We have a tiny bit of info about the Voodoo Lands from Annie's lore.

Annie's parents led some exiles into the Voodoo lands and built a colony there; the lore says it's really hard to live there, so at least we know a few things about it. Don't know anything about those other places though, it would be cool to see their history

Thanks, I forgot about Annie's lore, so we know a tiny bit about the Voodoo Lands.