It's hard to say for sure. The decision often depends on various factors like the popularity and sales of the original series, as well as the author's plans and the publisher's strategy.
I've never heard of Douluo Continent comics. I can't provide any relevant information. However, if you want to know more about the Douluo Continent manga's sequels, it is recommended to go to the relevant manga websites or social media platforms to search or consult the manga author or publishing company.