It is much easier to come up with a thesis statement once there is an actual argument to be made. The best thing to do is to first decide what commonality between "A Rose for Emily" and "The Story of an Hour" the paper will explore.
Examining the two stories side by side, they do share a few elements, the strongest being in their protagonists. Both are centered around a repressed woman: Emily is unable to embrace modernity, and Louise has lived as an existential prisoner within her comfortable but unfulfilling marriage. Society has kept both of these women from going out into the world. Emily is so indoctrinated into the Old South's aristocratic views of female subservience and class privilege that she is unable to free herself from her past, while Louise conforms to the Victorian model of the submissive wife despite not being pleased with this role. Of course, a key difference between the two is that Emily becomes aggressive in trying to control others, such as Homer Barron or the town officials who want her to pay taxes, while Louise dies the moment her husband's return challenges her newfound liberation, but the core similarities are still there.
A thesis statement based on this subject would make an argumentative claim on the similarities between these two women. This thesis might focus on how both are oppressed by their society or suffer from patriarchal norms. The point is to make clear what this similarity is, then to argue for it in the body paragraphs of the essay.