I might post the two potential peace treaties I see happening tomorrow.
Chose promise, chose due.
In the event of a Valois victory, it is very likely that the frequently contested areas between France and the Empire and France and Spain would go to France, such as Flanders-Artois, Franche-Comté, and Roussillon. Milanais, focus of the later Italian Wars, would also go to France.
Finally, due to the Savoyards seizing the French possessions in Saluzzo during the French religion wars, the French have compensated themselves with Bugey, Bresse and Gex (OTL département of Ain)
Henri de Navarre can rest easy, having seized back the Southern half of his country from the Spanish. In addition, the Dutch, who were fighting the Habsburgs, received their independence.
The Polish Valois also receive territory in the form of Silesia, which will be held by the King as a Duchy in personal union with the Commonwealth. It is done in order to ensure that the Crown can afford a reasonable independent funding from the Sejm.
In the event of a Habsburg victory, the Polish would lose Royal Prussia, which, while seized by the Habsburgs, will wind up in the hands of the Franconian Hohenzollerns. The Kingdom of France, however, would lose much more. The Duchy of Bar, as well as the Duchy of Burgundy, Picardy, and a number of border lands in the North would wind up rounding the Burgundian possessions of Spain. In addition, all French lands in Arelat would be seized, the Austrian Habsburgs receiving Dauphiné and Lyon, while the Spanish Habsburgs would go after Provence, linked to them by Languedoc.
Languedoc, Aquitaine, Angoumois and Saintonge would be undergoing very rough times, due to the implantation of the Spanish Inquisition in those lands where the French Kings had assigned Huguenot strongholds. Indeed, during the war, the Spanish soldiers pretty much went Albigean Crusade on the conquered territories, with the consequences one can expect.
So, on the one hand, a strengthened France and PLC, and a crippled Empire bound to explode under internal religious tensions; plus a Spain that may just lose Portugal and Catalonia when Felipe kicks the bucket. On the other hand, a crippled France, but a badly overextended Spain.
