Looking at the previous knowledge of The Well of Eternity, we know that The Well was simply a wound fullnof Titan blood after Aman’Thul ripped Y’Shaarj out of the earth.
The consequences of this were basically the creation of massive amounts of life and the evolution of life on Azeroths surface due to the magical arcane properties of the blood of the Titan in The Well. We saw the Dark Elves evolve into Night Elves/Highbourne etc and I’m sure here were other races which were also augmented and changed from the powers of The Well.
Reading the series War of the Ancients you see the spells of Rhonin get greatly amplified just being in the area surrounding the Well and even he was shocked at the size and scope of the spells he was able to cast. Basically feeling the magic from The Well and draw it into himself easily.
So what do you think the next expansion will do perhaps? Considering Artifacts are going bye-bye perhaps there might be an attunment to The Wound which will in effect be another Well. A wound full of Azeroths Titanic blood.
As the expansion progresses our attunment to The new Well becomes greater increasing our strength similar to how the Artifacts got stronger. I personally would have preferred a system similar to the artifacts just a bit different or perhaps the old “Path of the Titans” is going to make a come back in a new way now that the Titans are all back so to speak.