I know that there is a connection between the two, but I wouldn't call them interwined. It was like "Well, we won the shadow war. On snap, forgot about Earth under a guy who makes Hitler look like Ghandi.", I did find the Shadow War came and went very quickly though after all the build up. They spent years building up the support to fight them, then the Vorlons are just like "Frag it, let's just destroy everything and hope we win.".