Rohan will sound like Rick
- Partly because Weeaboss has hinted at this and Koichi already sounds like Morty.
- Confirmed in his reaction video, which is his first appearance.
Kira will sing David Bowie songs
- Come on, wouldn't that be awesome??
Josuke's savior will turn out to actually be the real Prince
Since Antfish will be a cameo, Takahata 101 or other TFS members will appear as well
Shigechi will be Eric Cartman from South Park
- Based on the audition lines for Shigechi in the arbidged series, I think it's safe to say this is assured.
At the end of the Series, Josuke will marry a Korean woman
- It would be a brilliant Brick Joke.