This is a family tree of the Wettins as of 1610, though I cheat a little by including Elizabeth of Scotland, who does not marry Christian until 1615. Marriages into other houses aren't included, in order to keep this even halfway manageable. Let me know if you really want family trees of other houses reflecting the new timeline. These include the Houses of Brandon, Wittelsbach, Welf, Hesse, Ascania, Kettler, Sidney and the separate branches of the Hohenzollerns ruling Brandenburg and Prussia. (In OTL, it's Maria Eleonora's marriage to duke Albrecht Friedrich that creates the dynastic situation that ultimately leads to the union of Brandenburg and Prussia.)
Lateral connections between husbands and wives with no downward progression are childless marriages, as of 1610. Let me know if I got anything wrong.
Finally, my apologies for it not being neater or more elegant, but it does convey the necessary information.
Oh, and don't worry, all this is going to get much simpler really soon.