Most people seem to think that Season 5 felt like a bit of a sort of "meh" period from those that I've talked to, and I remember things from the show post-Governor like the Terminus, Claimers, and Hospital bits seeming odd. That being said, I actually feel like the show took a huge hit long term with the whole "who did Negan kill" cliffhanger when he first showed up, making everybody wait until Season 7.
People were REALLY salty and a lot just rage quit over that because they felt outright insulted.
I could be wrong, but since the person talking at the end of the trailer saying something like "you guys are also into this?" is JP Noel, it leads me to think that it's hinting towards Tsubaki and Makoto being next, if anything.
Just pointing out that it was confirmed that the "7 characters per franchise with a guest 7" character select screen people thought has been confirmed to be a placeholder and not an accurate representation of roster size, yadda yadda, all that stuff.