The trailer looked cool, though I totally missed the Whisperers tease at the very end of it when I watched it at first. I had to listen with headphones and really focus on the audio - buried in the sound of the horde are voices saying "where are they?" That was really spooky. I think they have a chance to build up a better enemy than the Saviors, since the Whispers are incredibly creepy.
I'll definitely watch since it's Andrew Lincoln's last season (he stated at Comic Con that he wished it was kept under wraps and not spoiled, so it would unfold in the story - which I agree with fully). I read some theories that they could try and end the series on this season, which I think would be appropriate.