I like this. Tell me more
Blackbeard swoops in last minute with Van Augur's Warp Fruit, removes any Giants and Marines in the way with some sea quakes using his Tremor Fruit, has Van Augur Warp the BBP on Egghead onto BB's ship, and, bam, off they go with some Seraphim.
Winner's Island, the island Blackbeard beat Law at, was close to Elbaf, so, we should see him sooner rather than later.