[rogerph2015]

That "summer" movie you were referring to is Mashin Sentai Kiramager The Movie Bebop Dream. Overall, it is the second Kiramager movie and that was supposed to be in the summer of 2020, but due to the ongoing COVID-19 Pandemic, it was rescheduled to February 20, 2021 and is labeled as one of the three "Winter Movies" alongside Kishiryu Sentai Ryusoulger Returns Movie (Some say it'll be based on the cancelled Kishiryu Sentai Ryusoulger Final Live Tour) and Kikai Sentai Zenkaiger The Movie (Episode Zero) as part of the Super Sentai Movie Ranger 2021.