Board Thread:Game Discussion/@comment-9300867-20130606015415/@comment-9008292-20130606133934

They need to go back and update the older top 100 cards. DeNA has done this in Blood Brothers to alter stats of older rare cards to make them more on level with the newer cards they are releasing. This helps account for the power creep factor and also makes getting top 100 something worthwhile. Megatron/Omega Supreme/Hun gurr/etc... should become R5 and stats closer to the other R5 cards.

Then all the future R4 cards should remain on par with the existing R4 episode reward/raid cards.