It's not fixed. It's currently under discussion, and seeing how these game intrusions keep surfacing we can expect it to persist until the people putting the information conflicts into the articles stop doing it.
I don't remember if you joined this discussion, but in it I recommended that if someone would add something Spoiler-heavy to Iron Man 3, they should mark it as a minor edit, so that other people will have a chance to filter them out.
Because a few months back someone decided to jump the gun and publish speculative data. There was a forceful reaction from a number of other contributors, basically telling him to knock it off. Wikis are a place to document known quantities, and generally not a place to presume, speculate, or post assumptions.
If you have a look at the edit pane, you'll also see a note left by Lovewaffles requesting that no presumption be published until the characters are confirmed. I agree with that message too.
I was getting ready for work, and was going to get around that when I got home - I couldn't see any sysops active in the recent changes at the time.
I don't know how bad the vandalism is on this wiki, but I've had cause to maintain a Vandalism Report page elsewhere. It saves a bit of hassle choosing a sysop to message, and there are a number of us who will pick up on the report and block the offender. The concept might work here too.
it's not that bad here - I rarely remember a case when a vandal wasn't caught wiothon 24 hourse. as for the sysops, we usually watch each other's talk pages as well, so alerting one will most often alert the others as well.
The information provided was not speculative information. For example, the jotuns broke into the weapons vault specifically. Furthermore, I see no problem being specific about whom Thor's friends were. Regardless, I will respect your request and stop removing the links and altering the information.