I am actually hoping that they combine epics with the challenge system of crystal cove.
You select the epic checkbox then choose your CR setting from 21-30. The higher the difficulty the better the drop rates. This way less experienced players can get that epic taste and even build their gear (albeit much slower) and the more skilled, better geared, challenge seekers can choose CR 30 and really be tested, while being rewarded with more token fragments, scrolls and seal / shard drops.
Meh, I can dream can't I...?