The current timeline ends with the Empire getting news that a chaos warlord named Archeon is gathering a vast horde, 2522. Meanwhile Manfred has just kidnapped the high elf princess and done his evil chuckle. Plus various other stuff has recently happened as well concerning other races/factions.
If you could write what happens next over the next 10, 20, or 50 years then what would it be? *This 'future' may or may not include SOC, I leave that choice up to you.