I dunno - they could do it, but the only catch is that Zyuohger preceded it as an anniversary season, and has a crossover with Gokaiger. Still that didn't stop Super Ninja Steel, so maybe after the upcoming Ryusoulger, we could get Zyuohger for #29, and Kyuranger for #30. The only problem is that Zyuohger's crossover has footage of ToQ 4gou, so unless they add new Ryusoul Green footage for the crossover, they'll have to do ToQger first, making Zyuohger the 30th season.