Assumptions I'll make based on last year:
1) Uggla stays healthy and puts together a similar season, albeit a more consistent season starting off, pencilling him in for 30+ HRS and a power bat in the middle of the order.
2) SP remains a strength, even if we have a SP or two go down during the year due to a shoulder, leg, tendinitis, or whatever injuries you can think of.
3) Freeman produces a similar year, maybe better, maybe a little worse, but remains a consistent force in the lineup
4) McCann stays McCann
5) Bourn is Bourn
6) O'Ventbrel stays dominant
Now for the question marks..
Scenario 1: Chipper goes down.. again..but for a long time.
Yes, Prado would slot into that spot, so that opens up a vacancy in LF.
Who would be some potential fits? Who would be willing to move?
Scenario 2: The Pastor flames out quickly.
He's a rookie, so who knows, but its best to stay positive.
Who would be a mid-season acquisition the Braves would target?
Scenario 3: Heyward doesn't rebound.
Does he go down to the minors, does he remain the starter throughout, does he get traded (i know, i know, but just wanted to throw the option out there).
So, to summarize: LF, SS, and RF midseason acquisitions.
Keep it clean..ish.