You don’t really gain much by believing anything early if it ends up getting confirmed before release anyway, and if you make it all the way to the movie, you get to enjoy something you didn’t know was going to happen, while everybody else saw it coming and had it spoiled.
Since it’s impossible to know which rumors could be true and which are crap, David F. Sandberg’s recommendation is to just disbelieve everything until it’s confirmed by an official source.
That certainly has the benefit of making sure you don’t believe the false rumors, and while you might end up not believing something that turns out to be true, that’s far from a big deal.