I think the only real evidence we've got from B/W & B2W2 are the fact we can get shoal salt and I think the shoal shell too in B/W. In B2W2, I don't think there are hints towards pretty much anything other than the fact that the Pokemon World Tournament and Driftveil are plastered with emerald and green everywhere. Thats all I could get from B2W2.
So, I definitely do think the remakes will happen but I can't say that there is so much evidence solidifying it'll happen so soon. The only other thing I can come up with is my assumption on the other page that Hoenn will practically be completely unvisitable once they switch their main games the 3DS, but I wouldn't even say that means anything because they could just throw Hoenn in as a second region to a Gen VI game or something.