I'm skeptical about the WW or JLA #100s because so far neither cover has been shown to have a DCU. The Superman #100 is a possibility, because we now have several instances where both versions of a particular cover got a DCU (I'm still quite surprised by the Flash #100 though).
The Superman #97 closes another single issue gap, as does the Flash #116, so that is another area where I think we will continue to make discoveries. Superman #107, Superboy #10, WW #83 and 94, etc are where I will be looking.