Warner has decided to put the Justice League of America movie on hold pending a script rewrite. This will have to wait until after the writers strike. Your guess is as good as mine as to when this will happen.
Should you still pick up some JLA comic book picks?
That depends on your timeline. If you don’t mind waiting an unknown amount of time before you sell, this could be a good time to get the books. If you want a solid plan and date, then wait. The speculation risk of this play has increased. Once the delays begin, you never know when the will end if ever. Decide what is right for your situation.