What Do You Think We'll Meet Again Means? A Gravity Falls Fanfic

After the events of the Weirdmageddon, The twins go back to California thinking that all of that was over, BUT, since the story isn't over until I say it is; Y/N had met (And made a deal with,) Bill Cipher previously.
He now has a vendetta against them I guess.
I haven't thought out the whole story so you'll know as I know.
Maybe Major/Minor Character Death? Who knows, maybe not.
Also slight Dipper X Y/N, If that's weird for whatever reason, just wanted to let you know.

Enjoy and remember,
We'll Meet Again
Unless I give up and never post again.

Also credit to the original artist of the cover.