Question: is there going to be a season 4 of attack on titan?
Answer: Most likely in 2020 the season 4 of Attack On Titan will come out as the part 2 of the season 3 is yet to be aired, it is going to be premiered on April 1. Since, the franchise don't release the two seasons in the same year it is highly unlikely for season 4 to be released in 2019.