I would think this is obvious but please make an option for this to be a solo player game. I did play Arkham Asylum and Arkham City solo and it would be a shame if I can't play this unless I convince a friend to come over. I believe that BM:ACA can be played solo. And the DC DBG can be played solo. There are tons of variants for that game...
I am already disappointed that I can't play the DC Comics Deck-Building Game solo so this will likely be my choice to buy instead.