Too far away, imo.
Elbaph is many things, including the beginning of the final saga. The opening salvos of the prophesied "Great War" for the fate of the Third World are happening now.
I also would not count on the SHP cleanly matching up with the BBP. If I'm right, Blackbeard is moving against Imu soon and will gain a power so great he can imbue his followers with it, like Imu presently can. Allies will likely be involved with taking down the Blackbeard Pirates.
The strength of feelings can be multipliers to the adverse effects of Sommers' DF. Sanji is defined by his kindness. If Sommers is about to get back in the fight, a lot of people Sanji are cares about will be in danger. It would flow quite naturally for Sanji to confront Sommers when he's back on his feet, struggle greatly at first because his kindness is literally killing him, and then overcoming that through awakening CoC and avoiding more thorns with Future Sight.
If I'm right about CoC being a component of FS, then I think Sanji will awaken both at the same time/in the same fight, and use FS instinctively.