Not sure about Star Wars being accessed through Holocrons, but I do like the idea of using comics to access the Marvel Multiverse.
I just thought Holocrons made the most sense because they hold and record information. They're basically magical hard drives. They also look sick.I'd personally have gone with VHS, DVD or just a TV screen for Star Wars. But generally i am a fan of using the 100 Acres Wood mechanic for them. Have them be worlds of fiction Sora and Co can access.