User blog comment:Skipaleeto/How powerful with Gold characters get before original characters become obsolete?/@comment-26859022-20160614141921/@comment-28140789-20160614191337

While it's true that all competitive play involves only the Gold cards and that within this space of competitive play there is quite a range between the best and worst gold, all Gold cards use the same formula (into which their base stats enter as variables) to determine their stats, just as all silver cards use the same formula. Likewise, all augments increase the stats of cards of the same quality with the same amount. This is why Doomsday/Containment at EVII level 50 with all the support cards has just over double the attack of a comparable The Flash/Regime, despite 700 only being ~1.5 times 480.

A new tier would entail a boatload of problems further--if they did make a new stat formula for a new tier upward, they'd likely have to fill in the new tier with old popular characters to have some variety in it, or introduce new costlier packs with the new x-tier characters, or launch a bunch of challenges to get the x-tier running.

All of this would tear apart teams.

Technically, I don't even think the new Aquaman falls in the x-tier. The easiest thing NR could do to prevent one character from being run on every team is simply alter the new Superman. Otherwise, if they cared about the gap between the weakest and strongest gold (I don't know that they do, but then again I don't know that they even should), they could demote some of the oldest and weakest Gold cards. Superman/Prime is kinda shmeh as you mention, and Batman/Prime is decent but there are a million Gold Batmen.