Talk is less because it's clear who is stronger and they even played last year.
If it were Carlsen and one of the young super GMs like MVL or Caruana then people would be chatting about it.
... especially if the challenger were Naka... although in that case the match would end just after the half way mark after Carlsen won every game 
I basically get my chess world news from Chess.com forums. As far as I know the rematch is taking place in November, right? One year after Carlsen cruised to the belt in Madras, India.
Rememeber last year, most Chess.com users were posting and discussing the match almost all year long. By September, the chatter had reached a fever pitch.
Nobody's talking about the rematch at all. Did something happen? Did it get cancelled? (Do they still not have a venue?)
Lastly, I will say, that anyone who merely responds "google it" is not only going to get pwned but also is going to get a big red ant shoved up his tuchas.