Some firms preannounce new products long before they are actually available on the market. Previous research has investigated the effects of such new product preannouncements (NPPs) on consumer and competitor responses. This paper examines how NPPs affect consumers' construal of and preferences for the new product and, in turn, how these evaluations influence their preferences for the brands' other products. Specifically, the paper demonstrates that consumers' construal level of NPPs spills over to their construal of other products in the brand family, causing a positive, biased evaluation of these products. Three experimental studies reveal that the mere information about an NPP can shift evaluation of currently available brand products in a positive direction through construal‐level spillover and increased perceptions of similarity. The studies contrast NPPs to new product announcements (NPAs) and consistently find more positive results for the former. Moreover, the studies find that product newness has a moderating effect on the results, such that the positive spillover effects are more pronounced for really new products than for incrementally new products. The results also show that the effects are contingent on the credibility of the NPP: If consumers do not consider the NPPs credible, no positive spillover effects will materialize. Finally, the studies demonstrate that the positive evaluative spillover is specific to the products in the brand family and does not affect consumers' perceptions or choice of competitor products. Consumers actually rate the competing brand's remaining products lower when the focal brand engages in NPPs. The study has important implications for managers regarding how to use NPPs to influence consumers' construal and evaluations of brand products.