#4 LIJ vs Suzuki-gun
The New Japan factions are at an interesting juncture, with the Bullet Club dealing with internal conflicts between Team Cody and Team Kenny, and Chaos is concerned about Okada, leaving the other two factions (Suzuki-gun and LIJ) ripe for a feud.
The feud was heightened during the first round match between Zack Sabre Jr. and Tetsuya Naito; ZSJ's slow tactical technical style complements Suzuki-gun's rash heelish way of operations, resulting in a stellar match which Zack ultimately won.
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The faction war was slowly built up during the rest of the tournament even though EVIL was missing due to an orbital bone injury. I think this feud will heat up during the Sakura Genesis event.