As im planing to pick up all the TES games and do a big family tree thing... any way i whant to know how meany more are planed so i can decide if i want to get the dlc when they come out or all at one point

DLC for Skyrim? Nobody knows.

Before Skyrim was released, Bethesda said they would do less DLC then Fallout 3, but that it would be larger.

Fallout 3 had 5 DLCs, and Skyrim has two, and one add-on.

I suspect we will see one more Hearthfire type addon, and one more Dawnguard/Dragonborn type DLC.