Rick is going to pretend to serve Neegan while at the same time he is going to seek to unite all nearby towns/kingdoms into one force to take down the Saviors. This of course presumes that Rick still has any of his sanity left as he really looked like he was breaking down for good. it is quite possible that Rick's personality is going to go to a much darker place now.
Also there is a chance that an even nastier force is going to appear later on:
Perhaps Rick and Neegan will be forced to become allies?
However despite all that, I suspect fan demand will bring about revenge for Glenn and Abraham later in the season.
Also I liked that last touch at the end when that lone walker stumbled out of the woods and stopped at the spot where Glenn was killed and began to feast on the blood and bits on the ground after that they had taken his body to the motor home to take him back to Alexandria.
I woke up this morning and had pretty much gotten over the brutality of what I saw last night.
After all it's only a show.
However, I do question on one level why I'm watching the show.
I think someone that has more trouble compartmentalizing emotions is going to not want to watch the show anymore.
I think they are going to lose a lot of viewers because of last night.