I'm a huge fan of Scarlet Spider (Kaine) and Yost's work in general. I think I like the new team, but I feel Kaine is a little bit out of place. I'll keep reading it though, I'm not disappointed or something like that.
Ock will spend some time in Pete's mind as Ghost Doc, much like Peter did with Superior
Ock will have some kind of influence in the Original Sin storyline
Ock will stay in Pete's sub conscience until Spiderverse
In Spiderverse, Ock will take over one of the other Spider-men. Peter will be ok with this because of Ock's redemption throughout Superior and Original Sin. The Spider-man he takes over will be a villain or brain dead or something so there's not a moral conundrum for Pete.
After Spiderverse, Spock will return in his new body, get with Anna Maria, move to Chicago and be a hero there and have a new series where he tries to be a hero, have a life, and fight off his villainous tendencies.
Well, I don't know if you're right (we'll see), but I must admit I like your scenario.