As some of you know, I fell off the DC comp list with The New 52, and decided that was a sign from Zeus to start trade-waiting. And with the April solicits, I see decision time has arrived. That is to say: Which trades or HCs will I buy? I'm certainly not going to pop for all 52, so I have to pick and choose. So let me ask you, Legionnaires: Which titles are so intrinsic to New 52 continuity t…