Originally Posted by
Iron Maiden
Yes it is. There were some creatures that came through a portal in the Baxter Building and Reed determined that they came from the HR world.
I wonder if the High Evolutionary was able to reboot Franklin's reality engine that was controlling the planet, much like Doom did when he talked Franklin's avatar into letting him take control. It was descending into a chaotic world with rebellions cropping up all over the planet and Doom rebooted it into Planet Doom. When he decided to return to Earth and abdicate his rule over it to Lancer, he used the Negative Zone as a kind of short cut to get back to Earth, using Reed's Negative Zone Portal. IIRC the Negative Zone can act as a sort of Nexus to other universes. Strangely enough, I don't even think Reed knew he was in the building. It was never followed up anyway.