As you can see from the below post from @Combatglue a few months ago, there is more to come for the rest of the year! 
This current roadmap covers up to June, so it’s a possibility the next roadmap covers the remainder of the year, but I can’t see it personally. I think it will revert back to the seasonal format, that being Summer, Autumn and Winter roadmap, which will cover Year 4 content for the remainder of the year.