Basque stages are no rumour anymore. Stage profiles are already given by ASO. Especially stage 1 looks promising. Almost impossible to not have some sort of action between GC on that final murito. Second, still hilly, but Jaizkibel is less dificult than the final hills on stage 1.
2nd pyrenees stage (actually the first) could be Laruns, but theoratically this could be a sprinters stage as well. There are some vague rumours about plateau de Beille, but those seems les reliable so far. Another option mentioned is a time trail around Tarbes. Let see.
Unknow still are how the stages around and between the Puy de Dome and Grand Colombier mountain top finishes will look. Most start and finish places are known, but not if they will be a sprint, which seems to be likely. Limoges just before Puy de Dome probably will be a sprinters stage. But it's not impossible to include some small hills coming from the south neither. Finish is always a dificult one for sprinters (sprint uphill, but to easy for puncheurs)). Between Puy de Dome and Grand Colombier it mainly seem to be stages in the valley (Moulins, Villars-les-Dombes / Parc des Oiseaux), but also1 stage seems to be completely unknown yet (can be a TT, sprint, or even slightly hilly)
Morzine seems more than just a rumour as well. Even the tourist events seems to be in Morzine next year. Danger of this stage could be, that it's the best designed staged of the alpes for nest year (Saleve, Ramaz, Joux plaine, JouxVerte), but it will be squeezed between 2 hard HC finishes (Grand Colombier, Loze/ Courchevel airport short after Loze).
Last week is still a lot unknown. Only thing to be sure seems Vogezen (how many stages in the Vogezen seems still unknown 1 or 2), with at least HC version of Grand Ballon. Also mentioned in rumours, a passage in the Jura (not the stage to Grand Colombier, but more to the north) and a possible time trail around Besacon on the last Saterday.