Since this is an acquisition, On 3 will keep the subscribers, keep fansites (which are more like franchises) in markets in which they did not have a fansite, decide which fansites to keep in markets with duplicates. Most of the On3 sites were acquistions which were acquired because of their top position in a market, so the On 3 sites likely will almost all stay. I think everyone at eliminated fansites would be out of a job and would get whatever severance local law requires, with fansite owners getting some kind of buyout.
The National Rivals team? The best guys would get job offers from On 3, probably mostly offset by layoffs from On 3. Everyone else is duplication and would get severed, I would think.
It could be local fansite reporters get offers but they are likely to be few and far between. Does Callahan need a larger staff? The answer is No, I would guess. It's the same thing as before, just more subscribers. Keep Mongo? He probably is cheap as it is a part-time job for him.
I think Yahoo was losing money on Rivals, which explains the deal structure.