TMDb/That Time I Got Reincarna Celebrity Solo Leveling's reign faces a new challenge in 2026 as That Time I Got Reincarnated as a Slime returns with Season 4 and a movie. April 4, 2026 AceShowbiz - The anime world has witnessed the meteoric rise of Solo Leveling in recent years, becoming one of the most talked-about sh?nen series with its straightforward approach to action and power fantasy. However, in 2026, another heavyweight contender is poised to challenge its dominance: That Time I Got Reincarnated as a Slime.