One thing that was hinted at but not directly said: The die for a character is the same for all rarities (That was said). They've explicitly made it the case that you can use those identical dice for all rarities of the card. So, despite this game featuring four rarities (common, uncommon, rare, and super rare), you'll only ever need to get one copy of that chase card, and can fill out your play set with dice from the common. Also didn't directly mention, the other properties WizKids currently has Dicemasters products for are D&D and YuGiOh, with a DC Comics expansion coming in the near future. I felt this last point should have been spelled out, as ALL of those properties are of more interest to me than Marvel. Just remember, the rule books for the different brands call your dice different things, but "heroes", "monsters", and "adventurers" are the same thing, just like "sidekicks" and "NPCs" are the same thing.
One more thing, it's been a bit difficult to find information as concerns the color-blind friendliness of this game. The character dice are all unique so there's no issue there, but the basic action dice are all visually identical except for color. I can't speak for the Marvel sets (which have a different color scheme), but my friend assures me that he finds the D&D basic action dice to be visually distinct.
Last thing to note, the starters come with "Dice Bags". They're good for a laugh that someone would consider THOSE to be dice bags, but their inclusion was an obvious necessity. Regardless, do yourself a favor if you're going to play, and buy a real one from your local game store, make one yourself, or tap into that oldest of nerd standbys, the Crown Royal bag.