Well, I have a poll on fanpop asking that exact same question, and everyone's who voted on that poll says that Gideon's either going to be released or break out from prison. I personally believe he might try to break out and get revenge on the Pines family, but he wouldn't worry about trying to get the Shack, and he's just going to focus soley on getting revenge for them putting him in prison. You can comment here, or if you have a fanpop click this link: http://www.fanpop.com/clubs/gravity-falls/picks/results/1393213/think-gideon-will-return-season-2. Once you click that link, you should be able to get my fanpop poll. If you don't have a fanpop account, it's really easy to make one, so you can do that, or if you feel like making a comment on here, go ahead and do that too, you could even do both if you want to. Peace, love, Smile Dip, Gummy Koalas, and HatThiefShipping (HatThiefShipping is a pairing from the Pokemon anime that Ships Ash with Aipom) and it's the Ship I support the most.