First, I was an Ellen voter, because my desire to see the background of the thaumanova explosion was just bigger than the mostly known story about Abaddons fall.
In my opinion, the thaumanova story just opens more room for additional content outside of that fractal, as the thaumanova event was just a recent event happening in the world we are playing in.
It could be the arcane council which ordered to destroy it to hide something from the public, and after we know the truth, a civil war breaks out in rata sum etc.
The fractal just has potentional to affect the world outside of the FotM dungeon itself.
But I would also like to see the Abaddon fractal, so here is an idea how this could be done, without breaking the lore.
Lorewise, Evon Gnashblade would have funded the research on this fractal, so it appears that this is more a matter of time and money. So what if, after Dessa is done searching the thaumanova fractal, she opens a donation box. Adventures from all over the multiverse can donate into this one box located at the heart of the fractal of the mists. Once enough funds have been raised, she can start her research into this subject.
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