The RESURRECTED: The Buffy Summers and Beatrix Kiddo Principles

Buffy Summers died at the end of Season Five and went to what she perceived to be Heaven. Buffy was resurrected in the Season Six premier. Buffy told this to Spike in the second episode of Season Six: "Wherever I....was....I was happy. At peace. I knew that everyone I cared about was all right. I knew it. Time didn't mean anything, nothing had form....but I was still me, you know? And I was warm and I was loved....and I was finished. Complete. I don't understand about dimensions or theology or any of....but I think I was in Heaven. And now I'm not. I was torn out of there. My friends pulled me out. And everything here is bright and hard and violent....Everything I feel, everything I touch....this is Hell. Just getting through the next moment, and the one after that....knowing what I've lost...." 

There's no reason to think that all of The Twelve are thrilled to be alive again. The Hawks are quite used to being killed and being reborn. MM, Aquaman, Jade, Ronnie and Osiris were heroes. There's no reason to think that they didn't go to their "reward" when they were killed; that they went to "their" Heaven and that they're not too happy to have been pulled out of there. I call this The Buffy Principle.

BRIGHTEST DAY #1 Aquaman summons dead sea life. Martian Manhunter sees visions of himself killing people and morphs into a Black Lantern.
Something is WRONG with that....

Now we come to The Beatrix Kiddo Principle . Don Hall was complete. Don Hall was killed in the line of duty people saving the lives of others and was at peace with his death. 

The Nekrotic Eight all died with unfinished business. Just as The Bride forced herself out of a coma and to walk again to avenge what the D.I.V.A.S. did to her in El Paso , so to did the Nekrotic Eight and Hal (Barry is an anomaly*) return from the dead because of unfinished business. Don Hall had no unfinished business, so he is at peace. 

But The Twelve may have also been at peace. 

There's no reason to think that Martian Manhunter wasn't in his Heaven with his wife and daughter.... 

Theres no reason to think that Arthur wasn't in his Heaven with his sons.... 

I'd be cranky if I was pulled from Heaven (although I know where I'm going to end up and it's not up there, but I digress....) and brought back to the harshness of living. I think we're going to find during BRIGHTEST DAY that not all of the RESURRECTED are happy about being alive again.

*It's possible Barry circumvents being at peace because of his emotional tether to Iris , a connection that Don Hall did not have to anyone.