The Wikipedia entry states that one of the new Avengers: Initiative books has a mentioning of it...
Apparently the new host, (whoever he/she is), is considered a possible member for a team or something.
My gut instinct is telling me it'll be the brown Symbiote and some random male college host... Marvel isn't smart enough to make it the Purple Female one and a cute college girl.
Making it a male host is the "safe" approach I'm sure they'll take, (if the host is ever shown).
Edit: Actually regardless of whether it's the green, brown, purple or greyish Symbiote, (the 4 that comprised Hybrid initially)... if the host IS a cute female college girl, (and appears regularly), I'd make it a point to purchase the books monthly: I'm a big enough Symbiote dork and like the idea that much.