It appears that the new title sponsor of c9 is g2a. The reason I say this is if you look at the title of name in the tab when you open their twitch team page, you can see it is c9 g2a.
http://www.twitch.tv/team/cloud9

on sneaky's stream, it says that he is streaming on cloud9 g2a.

http://imgur.com/zwnlBz4

The reason I find this interesting is they are dropping the hyperX title sponsorship, which are sponsoring quite a lot of teams lately. Also this is a pretty huge sponsorship for g2a if they do get the title sponsor. Also I've looked on the c9 website and it does not say anything about g2a being a sponsor at all, so they would be a new sponsor for the team as well.

Sorry if this is well known info or something!


Edit: lol nvm, a lot of their sponsors are changing. Their old sponsors are the ones in the banner on this page

https://www.facebook.com/cloud9gg

The new ones are the ones on this page
https://www.facebook.com/Krepo.LoL

at least those are the main ones, I'm certain there are more than the ones shown on the banners.