Gazillion took to the forums yesterday to let players know that the loot boxes in Marvel Heroes would soon offer up more bountiful rewards with costumes showing up much more frequently.
They’re also making it so that players also receive loot boxes when they hit 5, 12, 15 and 30, and then another loot box the first time any hero hits 60. Those boxes will be given retroactively when players log in after the update rolls out on June 30th.
The downside to all this generosity is that after the update goes live, costumes will no longer be available for purchase directly through the in-game store. You’re gonna have to get lucky and nab them from a loot box.
Additionally, not all costumes will be available from the loot boxes all at once. The select will rotate every few months.
You can read more on the forums.