[AgileSiamang7]

How about a Film Genre based Rider, who fights separate monster factions who spend most of their time in-fighting (like the Greeed), trying to get their genre to be the most prominent, or only film genre out there.

The monsters' tactics can range from absorbing people's creativity, resulting in a populace that eventually just accepts the same bland sequels and different company counterpart films (like a really bad Disney vs Dreamworks scenario, with no charm or work put into either), deliberately ruining the production of an otherwise good film just to spite an enemy side, or creating controversy for a film by framing the actors/workers and giving it bad publicity.

Is a second generation rider, with the first one using old film reals and his belt being an updated version that uses DVDs/Blue-rays as swap-able forms. Final form is a Director based on, where he can yell cut during a fight and re-shoot it where he wins. Monsters can eventually grown strong enough to resist this by being divas (or just having strong wills, but that's basically a diva).