There are now official images of some of the LEGO polybags that will be coming in 2018. This is not an exhaustive list of what we can expect next year but it is some of the ones that we can already look forward to seeing on store shelves and as promotions.
LEGO City Hot Dog Stand (30356)
LEGO City Road Worker (30357)
LEGO City Dragster (30358)
Available from January 1-14 with purchases of $35 or more, while supplies last.