Today's big news is that it quite appears -- busy schedule aside -- that Craig is IN for Bond 25 ! As for his busy schedule, perhaps it will encourage the producers to get things together, run a tight ship and address something which troubled Connery years ago -- an overly long shooting schedule !
So -- ideas...
Running Madeline Swann through the Tracy-arc would be awfully repetitious of what we've already seen, with this Bond-universe, of the Vesper story line. But -- Blofeld is there to be used, and can be used independently of a re-run of the Blofeld-murders-Tracy aspects of OHMSS. I think it quite feasible that Swann and Bond agree, onscreen or off, that she was right when she figured she had to get out of this life....and that Bond could not, like it or not, try as he might...Killing her would be cruel and repetitious, and unnecessarily "lose" her for possible re-appearance later on.
Idris Elba -- everyone see him training in kick-boxing in Thailand ? He looks fantastic, but he is not getting any younger. Felix Leiter ? A LALD-inspired storyline ? The producers already have done it, so perhaps this time around, a wrinkle...as in, Bond sympathizes with (Elba-character's) motives and mission, and they form an alliance. I realize -- somewhat reminiscent of the "who's really the villain, and who's your friend" aspect of FYEO.
At any rate -- great news !!!