I agree with the feeling here, the books had very high production values and the designers were clearly passionate about them, but were clearly based on a absurdly wrong business strategy.
Centering the game around Marvel events, not having many of the iconic characters on the core book, not having even character creation rules in it, and making the power rules too similar, those were its faults.
Of course, even if they didn't make these, IMHO, mistakes, we aren't sure Marvel wouldn't have pulled the plug as well, as Marvel Saga and Marvel Universe were also cut short.
On the other hand, Green Ronin's policy for the DCA book is apparently solid, as they have just released the last planned book, and used it to spearhead the new M&M edition, for which they are releasing genre books (Supernatural Handbook, and the upcoming Cosmic Handbook, for instance), which always seemed to me a good decision, from when I picked 2nd Ed onward.