While Dune, Ghostbusters: Afterlife, and the upcoming and highly anticipated Matrix sequel, The Matrix Resurrections, will likely duke it out for the best sci-fi feature of 2021, there have been a few sci-fi features already released this year that have been under the radar. This could be because they borrow elements from previous sci-fi classics, and have received mixed to negative reviews due to their lack of originality or plot issues. However, the following sci-fi films convey some intriguing ideas involving time travel, love, survival, resurrection, and preserving precious memories.