Given the massive success of the series especially Official you say something shirt possible that Harmon has been receiving a great deal of interest from other outlets and he may be using that as leverage in his negotiations with Viacom. It certainly wouldn’t be the first time that Harmon has tried this see also community. It doesn’t seem that Rick and Morty is cancelled. It does seem that it may be more than a few years before it returns to the air, not only because of the negotiations, but because the amount of time that it takes to create animated series. If it does return to the air, I wouldn’t expect it before late 2019 or mid-2020 at the earliest.
I disabled comments to this answer as I wrote it before the series was renewed Official you say something shirt. It has been renewed; however many people were too lazy to look at the date when I originally wrote this before leaving a comment. Rick turns himself into a pickle to get out of family therapy Morty peed himself in class and Summer was huffing enamel in Art to get high. So then Beth takes the Anti-Pickle serum from Rick as a way to make sure that he didn’t just turn himself into a pickle just to get out of therapy.