Research conducted over the past 15-20 years has revealed significant insights into the nature and role of learner selves in language learning settings, particularly the importance of considering the interaction between situated contextual factors and the ways learners perceive, imagine, and construe their possible selves. To further advance this active line of investigation, this article first reviews key previous research and argues for the need to address the generalizability of learner possible selves through replication of original research conducted with different types of learners in diverse social and educational contexts, particularly in multilingual settings and in relation to learning target languages (TLs) other than English. Then, two studies are identified as ideal for replication, and their motivation, methods, and findings are reported in detail. To strengthen the validity and reliability of the original studies' findings, several suggestions are made for ways to replicate the focal studies as a necessary first step in building robust comparative evidence. As an important second step in this endeavor, the article concludes by arguing for the value of case studies that align with current dynamic conceptualizations of the self.