only if the lightsaber crystal was kryptonite. otherwise, i would doubt it as supes can withstand laserblasts pretty readily. however, you're forgetting the operationalization problem ... and perhaps the self-reflexive satire thing too. hmm ... maybe they could use a quantum shadowing technique between dimensions to relate scrabble turns. i bet superman would trounce anakin at scrabble. i mean, anakin never seemed all that articulate. that may have something to do with george lucas, though (i wish that i could just wish away the bad writing).

toward the operationalization quandry--the dimension inhabited by star wars ostensibly is also our own, just a long time ago and far, far away, right? i know of no city in my dimension called metropolis, but surely an incarnation of supes at some point inhabited our dimension. if so, then that superman could simply fly around the earth, reversing it's rotation thereby travelling back in time (a la superman the movie). then he could occupy the same time and dimension as anakin, which would leave the small matter of flying his super butt over to the mustafar and presto ... scrabble championship face-off.