With "300" scoring big bank at the box-office again in its second weekend ($127m and still climbing), the inevitable question becomes - what of a sequel?

Of course a direct sequel is out of the question, but now Variety reports that Frank Miller is hard at work prepping a follow-up to "300" based on another mythic tale from Greek history.

Which one though? Miller won't divulge details, and in any case is busy prepping to helm the "Sin City" sequel (due to begin filming inn June), an adaptation of Will Eisner's "The Spirit" and has comic commitments.

Of course before then there is already talk of knock-offs coming out in the wake of the success of "300". Highly stylised, R-rated, action hero vehicles with mythic overtones are expected to be rushed into production soon - no doubt the "Clash of the Titans" remake will be getting another look over.