User blog comment:TheUnown/Gravity Falls Crossover Possibilities/@comment-2249686-20140816214514

These are alll pretty interesting choices,

I'd certainly like to see a few non-canon crossovers, myself.

Such as maybe with DuckTales or Wander Over Yonder (not that I'm a fan of the latter, it's just that it has a pretty substantial fan base and is pretty popular).