The "canonicity" of JLA/Avengers
Why is this crossover NOT canon when it's referenced on panel in DC and in Handbook entries in Marvel? I actually believe it WAS referenced on panel in Marvel involving Terminus but I don't have the scan.
Here is the event in question from JLA/Avengers :
Here it is in Terminus' handbook entry confirming play by play what went down regarding him in JLA/Avengers :
Also why can't we use this as proof regarding how various characters would do vs each other between companies since this event IS canon to BOTH?