Rather than stand-alone game expansion

Cryptozoic has indeed always stressed that you can play both games together, but how this is to be made useful, they are silent about it off. Simply mix together both decks makes little sense, since the probability of good combos simply drops when twice as many cards are drawn. Cards like Suicide Squad, who are increasingly, the more you have of it, simply become less important when the stack of 400 cards is.
Cryptozoic suggests yes before to put together a deck that eg all the heroes of Set A, all superpowers of Set B includes, etc., so that the deck mixed, but remains the same size. This solution is also suboptimal. If you play a hero from the first set, but uses the Hero cards in the second, you have as a player directly a major drawback, since the individual hero card no longer is around to see it. So Superman could no longer get the "Man of Steel" card then. We are thus obliged, through trial and error to find yourself a good mix that is reasonably balanced. This is almost a science in itself and who just want to play, should rather both games separately.
Unfortunately Heroes Unite is an independent game and not so hot. The mechanism is of course the same, but on the one hand the superheroes only B-team, on the other hand the rest of the cards are partly rather unimaginative and boring compared to the original game.
So what is the conclusion? As DC fanboy I had to slam halt. Realistically the game is not very often end up on the table. Since I prefer to play the original game, suppose maybe the Supervillains from the expansion with it. Many superhero is perhaps also with the original game, if you mix its corresponding hero card into the deck. In the end, I can only recommend the whole thing but real fans who feel just the game interested in and the heroes as a secondary matter, should just buy the original version and thus be happy. Superman, Batman and Co. are now times cooler than Hawkman or Red Tornado.