I'm in the US.
I will be installing a 240v outdoor outlet for an EVSE (electric car charger). However, in a few years I will have a garage built (elsewhere) and will move the EVSE to the garage, so won't need the 240v outlet anymore. At that point, I will instead use that outlet for my workshop and would like to have two 120v circuits: one for lights and a 120v air conditioner, one for power tools.
[Edit: the workshop will be for power tools and the garage will be for parking/charging the car. They are not the same structure, the garage is unrelated to this question and will be far far away.]
Is this possible with a single 240v cable? Alternatively, would it be possible to start with two 120v circuits of opposite phases, and wire them together to create 240v and then later go back to two 120v?