Sure, let's throw away 2 years of gameplay, I'm sure none of the old players will quit because of that...

Seems fairly safe to say that this won't happen.

But to humor the idea briefly, I would think that... I'd say introduce a new type of reset mechanic. (Don't force anything on the players, just expand the scope of the game into a new grind direction.) Like, this isn't just resetting the world, it's resetting the timeline. Or something like that. And introduce a new prestige token for it. The one for world resets is the Gemmed Idol from Bush Whacker, which is only a few steps up in the game's hierarchy of power odds trinkets. http://bushwhacker2.wikia.com/wiki/Power_Trinkets Perhaps a drop for a timeline reset would look like the Amber Idol or the Jade Cat Statue or whatever they might want it to be. So you'd reset all objective campaigns back to being counted as incomplete (including even getting the guaranteed chest drops on bosses again, although you'd keep all unlocked crusaders.) and maybe all of your world-reset-gained idols get condensed into a stronger form as Jade Idols or whatever (you'd keep most of the same DPS and gold bonus and there would be a new bonus added on top of that) and all of your other trinkets get condensed into stronger forms as legendary versions of those trinkets (conversion rates give 1 for every W common, X uncommon, Y rare, and Z epic trinkets that were owned) where those each grant a stronger form of the same bonus plus some new perk. The new perks would include things to make it easier to get going / easier to earn idols than it was originally... But the Jade Idols would not count as anything towards talents (unless perhaps it's for a slight % reduction in talent level costs). Only the regular old Gemmed Idols would be good for talents. And maybe all of your gear downgrades to common (except for Graham since we can't regain his stuff?) BUT you keep golden status where you have it (common, uncommon, and rare gear can have golden variants in this idea) AND all of your gear gains "Jade Levels" based on how high it was (including legendary levels) before the timeline reset, with some scaling bonus based on those levels (multiple timeline resets will keep piling up higher and higher bonuses to your gear through these levels).

I'm not really expecting the devs to leap at implementing anything I just suggested either. This was all pretty far out there. (And I didn't bother breaking it up into smaller paragraphs or better organized thoughts since I wasn't really taking it completely serious as I came up with it.)