I voted time of legends.
Why:
I want an improved 8th edition. I want to be able to use my 4 armies (Tomb Kings, Ogres, Daemons of Khorne and, of course, Lizardmen).
If they did times of legend it would enable all previous armies to be used within the lore and add new units or rules. The lore is always talking about armies being bigger, stronger, more numerous, etc. This would be the ideal setting.
To be honest, the time era it is set in is less important to me than the rules set and being able to use my armies.
If they managed by some miracle of miracle to actually get the rules right and improved (or just leave them the same for crying out loud if they couldn’t work out how to improve them) and level out the armies(depowered or empowered appropriately) then I would be happy.
If they they’re making the rules true to the lore it would have to be pre-end times though as otherwise several armies are kaput.