No Non-canon SourcesNon-canon sources are invalid for evidence. With rare exceptions, comics not in continuity such as Elseworlds, What Ifs, or alternate universes are not used for evidence in debates of a particular mainstream character. A canon source is one that is regarded as being 'in continuity'. In the example of Star Trek; instances from the series and movies can be used, but books are definitely out. Comic book crossovers are usually unusable as they ignore common sense most of the time (DC vs. Marvel is certainly unusable in some cases in our debates!).
This includes JLA/Avengers. Canon or not, people just aren't going to agree on it in most cases. Besides, there should be plenty of other comics with which to make your point.
Taken from the rules.