Idea for weekly elite marks

[Darsho]

A lot of people seem questionable about the notion of having weekly or daily mark bills worth the amount they are when people can just wait for slots to open and obtain seals from them instead. Seeing how, canonically, Primals are summoned to Eorzea almost on a regular basis (and how more than a little of the adventuring population seems to be in possession of the Echo...) why not have a weekly Primal mark? Once Shiva is out it could be an optional weekly quest separate from the current weekly mark that gives you a mark bill tasking you with putting down said primal for a hefty weekly reward.

Since Primal encounters are so coordination based, every player can be given a different weekly mark and party finder groups will be able to find players to band together to hunt and kill their weekly primal mark. That way older content has incentive for people to go back to, players will have a reason to cooperate rather than compete for hunts, and we can get a new weekly bill as a change of pace from the norm of rushing 'n' zerging mobs.

Anyone with any thoughts or ideas? Or do you just think it'd be funny to see King Mog's face on a bill, any feedback?