Thanos has the reality gem, how far does he get in trying to conquer DC Earth as it currently stands. Spectre cannot interfere.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
Its the entire JLA lineup. However Thanos gets to launch a sneak attack, given 1 week of prep only to determine who and when he will assault.
If he manages to pull off his sneak attack against the JLA, the rest of DC earth will unite to beat him. However at this point, if he manages to defeat the JLA, Thanos will attain Hal Jordan's GL ring.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
Very bad for the JLA. Thanos can ressurect people at will with the gem(Mar-vell only to kill him later) along with anything the gem permits him to do. he can just ressurect several former JLA villains who passed on dupe to serve as his henchmen and warp reality around the members.