I'm willing to bet that Cumulus will drop ESPN radio from all its owned stations. I know that 1230 and 1340 could return to simlucasting because they cover different areas. I know that 1230 and 1340 are owned by dickey so maybe the current arrangement for those two stay in place and ESPN keeps a home with 1230. I wonder if ESPN might go to 590 and Radio Disney gets the ax. I am confident that ESPN will not be on 680 or 92.9 based on the press release. Will 680 stay as is replacing ESPN with CBS SportsRadio or will 680 go CBS sports radio full time and the FAN moves to FM. Several AM/FM sports simlucast stations will end its simlucast with the AM going CBS full time and FM will stay mostly local. This ought to be interesting.
I think the only reason Radio Disney is on WDWD 590 is for the Mouse to be able to say they are on the air in market #9 for their national ad sales. My daughter doesn't listen anymore so they lost probably half their listenership.
This is an opportunity for 790 to pick up ESPN (790 carrying ESPN is probably more attractive for the Mouse than having to dump Radio Disney to keep ESPN's place in ATL), since I agree that WFOM (1230) will likely drop it for the reasons you mention. I don't know of anyone who listens to either WFOM or WIFN (1340), except during football season for PBP for teams other than Tech and Georgia.
I still think that Dickey is likely to dump WIFN so Cumulus can pick up the two LFM stations at some point. But would Cumulus then put or keep ESPN on 790? I doubt it.