It may just be my giddy excitement talking, but I had heard some rumblings a while back that Disney and Marvel might be talking and I said at the time: "Well nothing will be official until Fox releases FF, but they could be working contingencies based on certain performance levels."
With this film at 10% on RT and Rise of the Silver Surfer Box office not even a possibility, Fox knows and Marvel knows that Fox has zero intention of making another FF film, so I really can imagine a deal could just be going through the final lawyer look-over at this moment.
If they just started talking today, yeah, no chance. But with the rumblings we've been hearing and the timing of this comment today, I really believe this could be all but a done deal.