That makes a fair bit of sense; it's not unprecedented to film a season while another is airing or to have such a small hiatus between seasons. I think it's either going to be in the spring (I agree with a May finale) or in the fall; BB10 takes up Sundays in the summer. Heck, I think they could even do bot hthe summer and the fall like with TAR5-7.
And as for fearless predictions, I think we'll be seeing more in the way of Asia this time; the previous few seasons have had many legs in Europe (TAR12, TAR9) or South America (TAR11, TAR7, TAR6) with TAR10 being the exception. I would also not be surprised to find a leg or two in Australia/Oceania, because it's been overdue I think.