Okay, so I've been trying to wrap my head around what happened in the Loki series, and now I've come to the conclusion that the multiverse has always existed. Right? From our perspective, it's a whole new occurrence, however the Loki series - and more specifically, the TVA exists outside of what we (and the MCU world) perceive as time, therefore the events that happened at the end of the Loki series, and at the end of the TVA arc have always been. Therefore from the perspective of the MCU, the multiverse has always existed. A headache maybe, but it allows for other properties to be brought in as they've been there, they've just been inaccessible. This true timeline isn't even an element anymore.