As everyone noticed, the same castle from the lava world exists in the ice world. Knowing that, I think its safe to say the desert world also has its own castle.The way I see it, the castle is likely a part of every alternate dimension and therefore it must play a vital role in each of them. Now however her dimension jutsu actually works, I think the castle is the key to its functionality and therefore its only weakness. Its role might be to act as the glue holding all the dimensions together, perhaps through some powersource or physical artifact stored in the castle itself.
Considering most of Kaguya's enemy's would be dead before ever seeing a second dimension, the average opponent would never discover said weakness. Therefore, my prediction is that Sasuke stumbles across the desert castle, realizes there might be a connection having seen the lava castle earlier in the fight, discovers the powersource of the jutsu within the castle and destroys it. Knowing Kaguya will likely try to kill Naruto while Sasuke is separated, he shouldn't have problems doing it. Thoughts? Am I looking too much into the fact both the lava and ice worlds share the same castle?
Considering most of Kaguya's enemy's would be dead before ever seeing a second dimension, the average opponent would never discover said weakness. Therefore, my prediction is that Sasuke stumbles across the desert castle, realizes there might be a connection having seen the lava castle earlier in the fight, discovers the powersource of the jutsu within the castle and destroys it. Knowing Kaguya will likely try to kill Naruto while Sasuke is separated, he shouldn't have problems doing it. Thoughts? Am I looking too much into the fact both the lava and ice worlds share the same castle?