Try to buy War of the Chosen with the base game and start directly the DLC. It doesn't continue the main story, instead it is the original campaign plus extra cool features. Unfortunately, if you have already started the original XCOM 2, I don't think that you can import the save games into the DLC.

Try to buy War of the Chosen with the base game and start directly the DLC. It doesn't continue the main story, instead it is the original campaign plus extra cool features. Unfortunately, if you have already started the original XCOM 2, I don't think that you can import the save games into the DLC.