Well it specifically says that the speck of light "had once been a man". Maybe it means a man as in the difference between male and female or maybe and more likely imo as a human male. Of course it's speculation on who it is but Sigmar was the only god in mortal flesh present at the rift as well as being the Arch God of the "good side". It seems the most likely to me that if anyone is going to be sucked into a void rift and survive it's him.
In the book Malekith is seemingly crushed by rubble while saving the Everqueen
The passage at the end of the novel says regarding the pinprick of light that "it fell for what might have been centuries". That could easily be a couple of hundred years. The definition of an eon/aeon is just an indeterminate very long period of time or geographical time period division. The novel seems to clarify it.
Agreed there is no obvious confirmation that any humans survived but if Sigmar did survive as I suspect then maybe his miracle was to bring some back. Any further information on what happened in Lileath's pocket dimension? In the novels it just says she lost contact with it.
The Orcs and Ogres in the book provide no information about what happened to them post apocalypse except that Gork was personally pushing Grimgor hard to stop Archons plan. Ogres as a faction seem finished given Grimgor killed Greasus Goldtooth and subjugated the remaining Ogres and it was heavily implied that he destroyed the Chaos Dwarfs as well ("Gork had shown him favour and given him strength enough to kick over the stuntie's towers and turn their ziggurat of black obsidian into rubble"). I somehow suspect that Gork was Plan A (kill Archon and stop the apocalypse) and Mork was Plan B (get the boyz somewhere else).
I just don't agree. Unless they use "just before" End Times as a permanent setting for Warhammer or retcon the whole thing I think it's almost certain they will trim some of the races at the very least. They could have easily merged some races together and moved the story forward without destroying the Old World. In fact I presented an argument for that very idea but it was based around certain things having "plot armour" which proved not to be the case (e.g there still being a world at the end of it). The course they took speaks of something more drastic. Maybe I'm wrong but I doubt it. The problems with current Warhammer are well known by all.
I agree it would seem insane but who knows (...really who saw the end of End Times coming?). That's why I asked where Skarsnik went because I was wondering if there was anything about where he ended up in terms of providing a continuity for Orcs & Goblins in the post-Warhammer world.