Is this game really a lot closer to ER than BOTW was?
I saw ER as a better BOTW personally. Similar games (to an extent) but ER was like the Super Saiyan version. If this game moves things closer to ER that can only be a good thing for me.
At the very least I assume they learned a lot from ER design-wise and incorporated elements of it. Lifting ideas from uber-successful games is normal in this industry and if you can innovate on them, even better.
If this is ER but a bit easier, then that'll probably be right up my alley. Though ER's difficulty never bothered me and I think it's part of the point (i.e. if you can persevere in ER, you come away with more confidence in the real world...plus it isn't actually that hard)
So yeah, if this is really Elden Ring + Zelda then that's awesome and I'd probably play it sooner.