Hello everyone,

I have somewhat of a dilemma. I am writing the "sequel" to a novella that I previously self-published as a kindle ebook. I want to make this a full length novel. The ideas are flowing. The problem is whether or not I should classify it as a sequel. I hope to submit this one to publishers. I want to continue the story of my characters, but will this be detrimental? Should I start with new characters?
Any thoughts or ideas would be greatly appreciatd.