History YMMV / OOODenOAllRidersLetsGoKamenRiders

* CompleteMonster: In the movie ''Film/OOODenOAllRidersLetsGoKamenRiders'', the Great Leader resurfaces as the final villain to use time travel to conquer the world, even murdering his own generals to achieve victory, believing in achieving power for himself no matter what the cost. Defined by his [[AGodAmI God complex]] and desire to [[InTheirOwnImage remake the world in his own image]], he represents the very worst the franchise has to offer.

* FridgeBrilliance: It's always a little weird to see [[Series/KamenRiderRyuki the 13 Riders]] in crossovers, considering that [[LateArrivalSpoiler their Rider War ceased to exist due to Shiro Kanzaki changing time so that the Rider War never happened.]] However, this time, there's a very big justification: It's not just the whole TemporalParadox plot where time is all messed up. The Owner himself said that the Riders came back because of people's memories of the Riders. Considering that the Rider War has happened multiple times thanks to Shiro's [[TimeTravel Time Vent]], people probably have several timelines worth of memories of them helping or saving them, especially [[TheHero Ryuki]]. This also probably explains why, despite some of them being [[AxCrazy complete]] [[BloodKnight psychopaths]] or [[{{Jerkass}} jackasses]], they all show up for the finale: [[AdaptationalHeroism Since they indirectly help people by killing Mirror Monsters, people only remember them being saviors, and thus all of them became heroic]] (note at this point that Takeshi Asakura has a laundry list of arrest warrants and otherwise remained under the radar, but as Kamen Rider Ohja he once saved a girl on a cruise ship from three Mirror Monsters. He only shows up as Ohja because that's how he was remembered!)

!! FridgeBrilliance:
* It's always a little weird to see [[Series/KamenRiderRyuki the 13 Riders]] in crossovers, considering that [[LateArrivalSpoiler their Rider War ceased to exist due to Shiro Kanzaki changing time so that the Rider War never happened.]] However, this time, there's a very big justification: It's not just the whole TemporalParadox plot where time is all messed up. The Owner himself said that the Riders came back because of people's memories of the Riders. Considering that the Rider War has happened multiple times thanks to Shiro's [[TimeTravel Time Vent]], people probably have several timelines worth of memories of them helping or saving them, especially [[TheHero Ryuki]]. This also probably explains why, despite some of them being [[AxCrazy complete]] [[BloodKnight psychopaths]] or [[{{Jerkass}} jackasses]], they all show up for the finale: [[AdaptationalHeroism Since they indirectly help people by killing Mirror Monsters, people only remember them being saviors, and thus all of them became heroic]] (note at this point that Takeshi Asakura has a laundry list of arrest warrants and otherwise remained under the radar, but as Kamen Rider Ohja he once saved a girl on a cruise ship from three Mirror Monsters. He only shows up as Ohja because that's how he was remembered!)

* FridgeBrilliance: It's always a little weird to see [[Series/KamenRiderRyuki the 13 Riders]] in crossovers, considering that [[LateArrivalSpoiler their Rider War ceased to exist due to Shiro Kanzaki changing time so that the Rider War never happened.]] However, this time, there's a very big justification: It's not just the whole TemporalParadox plot where time is all messed up. The Owner himself said that the Riders came back because of people's memories of the Riders. Considering that the Rider War has happened multiple times thanks to Shiro's [[TimeTravel Time Vent]], people probably have several timelines worth of memories of them helping or saving them, especially [[TheHero Ryuki]]. This also probably explains why, despite some of them being [[AxCrazy complete]] [[BloodKnight psychopaths]] or [[{{Jerkass}} jackasses]], they all show up for the finale: Since they indirectly help people by killing Mirror Monsters, people only remember them being saviors, and thus all of them became heroic.

* PlotHole: A lot of plot elements are either pulled out of or disappear into nowhere, to the point where thinking about them too hard will probably make your head throb.