Based off of what they did with UFC, I'd say they're going to maximize the event calendar. UFC went from sub 30 events per year to floating in the mid 40s yearly. And that's not counting the Contender Series, which could easily push them to the 52 range, averaging one event per week, the vast majority of which you need ESPN+ for to at least watch, if not pay for. WWE might move back to the early 2000s model of trying to get more than 12 main roster PPVs/PLEs on the schedule.
Consolidation is going to sweep out a couple of the less needed executives/behind the scenes people bushed. Y'all might joke about it eventually, but if there's any time Kevin Dunn might get got, this might be the best chance. I can easily see them at least looking into the option of production staff consolidating to eliminate redundancies.
On air talent probably might not get hit all that hard. The UFC roster is larger then it's ever been. You just might see folks that aren't good with more than ever just being someone sent out to eat up airtime decide they're ready to leave. Might see them tighten things up even more on what talent gets travel/lodging covered in their contracts.
You might see future world champs play a compromise between the Brock/Roman (not showing up week to week, almost never wrestling on TV), and the Rock/Austin (not wrestling week to week, but usually having at least a segment or two each week), to maximize value of the PPVs/PLEs they actually wrestle at.
Pretty decent chance of seeing TV rights consolidate so that they're maybe not split between two different companies.