Way I see it, only way alternative rock ever returns to Chicago is somewhere in the 88-92 range, on a noncommercial/college station 
Kiss 103.5 won't lean Alternative, they're doing very well with their Rhythmic/Urban lean (they're going after B96 and protecting GCI, remember)... XRT plays some alternative rock but is a AAA station
Kiss 103.5 won't lean Alternative, they're doing very well with their Rhythmic/Urban lean (they're going after B96 and protecting GCI, remember)... XRT plays some alternative rock but is a AAA station