As far as I can see they already have ditched it with the overlapping generations teaching. If they can get people to swallow that, and they have, then they can just keep it rolling on and on. The 1914 ditching has already begun.
Now that they've made the GB the faithful and discreet slave to take any importance away from the remnant who partake every year they could turn the increase in partakers into new light rather than a problem. To replace anointed who became unfaithful in the past or something. That way as long as there are partakers the overlapping generation keeps rolling on and on and who needs to even remember 1914?