Many options, worst might be that you become part of the 1% that is waiting post 2019.
FTTP is an option.
FTTrN is an option
G.Fast is an option
4G is an option
Fixed Wireless is an option.
As for another company taking over, its an option but will depend on where you are, for example the test pilots for the final 5% areas are NOT using BT at all, so might be people you've never heard of before who become the option for your area.