Well, even though it is true that John Robert Burke (Bart Bass) will be coming back to Gossip Girl, my speculation that Bart might actually be alive is not true. “He’ll be a ghost,” one source tells me.
But, get this—Spoiler alert!—that doesn’t mean that Chuck doesn’t have a “dead” parent who might not be so dead after all!
“There’s a huge storyline later this season that is going to blow you away,” promises my source. “And it involves Chuck, Jack Bass and Chuck’s mother.”
Also making a comeback? Serena’s father. “We will see him this season,” says the source. “But he hasn’t been cast yet.”
Whoever it is, he’s going to bring with him another major storyline arc and mucho trouble for Rufus Humphrey.
Also in the love department, thanks to Chuck’s newfound family dramarama, you can expect Chuck and Blair to heat up again.
And for you Olivia (Hilary Duff) haters, you’ll be happy to hear that she is off the series for good, leaving Dan all by his wonesome to get together with longtime special friend (with threesome benefits) Vanessa.
I’m also told that the long-held feelings Nate has had for Serena (don’t forget the triangle drama that started off the series) will add some pretty deep emotion to their upcoming pairing.

source: E!Online