I haven’t participated in many seasons, so having these Ethereal weapons and the power creep which they bring got me thinking about how they could one-up it for S25. Has there ever been a season which the theme provided such a power creep that they could recycle, or do you think they may have something else they’re planning on?
I realize there are still several weeks left of S24 and everything is purely hypothetical/speculative.
I don’t believe that they’ve recycled a theme as of yet.
Not yet. We should run a registered user poll asking what theme they should remaster.
Not about power creep. However they HAVE re-used very old Season themes as late season bonuses.
For example the Season 14 theme of Greed (double goblins) was granted part way through a season during COVID.
During Season 21 they also brought back double bounties
Yes.
The “season of the follower” will be repeated for all time as it is was made a permanent addition.
Not sure about recycling themes, but they have been recycling seasonal cosmetic rewards - wings and pets. Last season Emerald Serpent pet was recycled from season 11( 
?)
If they can repeat the seasons 16, 20, 22 & 24 buffs in one season… 
Seriously, I think they’ll find others ideas for future seasons.