If the match-up was announced after the Maia fight as it was probably planned - Silva wouldn't get his walk around weight over 190, and would have made 170.
It was more than hinted. Silva was asked about fighting at 170 and said he could do it. Rogan was talking about it all through the show and during the fight.
This fight was supposed to happen, before the Maia outrage, Dana White threw a temper tandrem, shuffled the cards a bit and now we have what we have -
GSP v Kos II ----------- Silva vs #1 MW contender IX and then Silva vs #1 MW contender X