You can't really judge 99x's ratings on a trans.
True, but their numbers during the last couple years on 99.7 FM were rotten. About the same as Rock 100.5's ratings today.
That said, you raise a good point. Dave FM was responsible for much of 99X's erosion when it was still located @ 99.7 FM. Now that Dave FM is gone, it would certainly be possible to build a coalition around both stations' former audiences.
I doubt The Bone would be calling itself "REAL Rock" (an implicit slam against Rock 100.5) if Rock 100.5 were to stay as-is. Knowing what's now gone down at 98.9 FM, I think it's likely 100.5 will see some significant changes. I'm thinking we will see an adult Modern Rock station similar to WRFF Philly, WBOS Boston or WLUM Milwaukee.
I sure hope the ATL doesn't wind up with a half-assed attempt at the AAA format Cumulus has tried in various markets in the recent past. Recall the sound of 100.5 FM a couple years ago.
Another (albeit less likely) possibility would be to put some type of Variety Hits, Classic Hits, or Gen-X station on 100.5 and resurrect 99X at 97.9 FM.
If all of this ruckus had happened a year ago, I cannot help but wonder if 106.7 would've been in play.
One parting thought: how many successful Top 50-market new station launches has Cumulus had in, say, the last ten years? By "successful," I mean a station becoming a major ratings or revenue threat. I am hard pressed to think of a single one!!! 96Rock in Cincinnati is moderately successful, but is hardly a major revenue force in that market, and quite frankly, had lousy ratings prior to 94-9/97-3 The Sound leaving the air.
The problem with Cumulus is you have two or three programming "minds" in their 50s calling all major programming shots from the corporate office. Then, these morons wonder why Gen-Y finds radio to be largely irrelevant.