Knowing very little about the Death GA, I don't see a revamped Tomb Kings as being completely insane, but I do agree it is unlikely. The problem with Death lorewise for me is that they are too organized/connected. Right now Death only seems to have three battletomes, LoN, FEC, and Night Haunt. Ghostly flame skull is almost dead certain to be a ghostly army (and they are part of the new hotness). The fanged skull screams vampires which as far as I can tell is LoN only. That's two of the three Death BTs right off the bat. If the FEC is included in the fanged skull, then things are all wide open for who knows what. A small tomb king revamp/whole new army with a few key heroes as new kits combined with a reboxed skeletons box doesn't feel too outlandish.