That line of thinking got us the Metrodome, Fulton County Stadium, the Vet, Three Rivers, and Riverfront Stadium. None of the aforementioned cookie cutter multi-users have been fondly remembered.
As far as getting this through the Evanston City Council, good luck. That's some of the wealthiest real estate in greater Chicago, and they'll play hell allowing something like that to be built in their precious little neighborhood.