So a while back Cartoon Network recently released a short on their YouTube channel, which is actually a pilot for a show called Infinity Train. If you haven't seen it yet, I highly recommend it. In fact, seeing as its on YouTube, I can just put it here.
If you like Gravity Falls, I'm sure you'll like this. So what do you think? For those who have already seen it, do you have any theories?
Also good god that theme jingle gives me chills.