It sounds like you’re referencing a storyline or event involving Jon Moxley (formerly known as Dean Ambrose in WWE)

and Tetsuya Naito, possibly in a wrestling promotion outside of WWE. Here’s a breakdown based on the information:

Context:

– **Jon Moxley (Dean Ambrose):** Former WWE superstar who gained significant popularity,

especially during his time as part of The Shield.
– **Tetsuya Naito:** A prominent wrestler in New Japan Pro-Wrestling (NJPW), known for his rebellious persona and being a former IWGP Heavyweight Champion.

### “CONCUSSION” and Usurpation:
– The term “CONCUSSION” could imply a significant event or storyline twist involving Jon Moxley, possibly a metaphorical or literal setback.
– **Usurped by Tetsuya Naito:** This suggests that Tetsuya Naito has managed to surpass or defeat Jon Moxley in some manner, potentially taking away a championship or a significant status.

### The Shield No Longer Has a Champion:
– This statement indicates that neither Jon Moxley nor any other member of The Shield (if referring to Roman Reigns or Seth Rollins) currently holds a championship title.

### Analysis:
– **Storyline Impact:** The storyline seems to involve a power shift or a pivotal moment where Jon Moxley, possibly after facing challenges or setbacks (such as a “CONCUSSION”), loses his position of prominence to Tetsuya Naito.
– **Dramatic Potential:** Such developments often lead to intense rivalries and new story arcs, driving fan interest and engagement in the promotion.

If you have more specific details or want to explore this further, feel free to let me know!