Lots of variables. If the the drought pool went hypoxic you may be left with little to no game fish to act as brood stock. Then you're be left with rough fish (gar especially) who handle poor water quality well.
If somehow gamefish and baitfish were to survive you would experience what is often called the new lake syndrome. Flooded vegitation and woody structure act in a way to culture a boom of baitfish, and gamefish. In this scenario fish will seek shallow structures (except palagic sp like hybrid striped bass etc) as it will harbor greater food sources. Seasonally this will continue as water permits.
Your restocking times will vary due to brood stock numbers, bio load, water quality, topography of water body etc.