Ch. 926 is a good example of what it actually looks like when there is potential foreshadowing of Blackbeard going to WCI. Reminded me of all the theories of Blackbeard going there during the WCI arc despite there being literally nothing close to actually foreshadowing/hinting that Blackbeard would magically arrive during the arc. Post-Ch. 926, now if he actually goes there, it won't feel completely random. That said, it could go either way. Both Wano and Totland have their own respective rewards for Blackbeard, as well as there being a potential Marineford parallel that he could fulfill in an arc with an antagonist that wishes to die, especially if he does want a 3rd DF.