Absolutely nothing. Maybe catastrophic damage from swording, but naaah.

Point I raised on Twitter this afternoon: How many battles has Zetsu (either form) recorded, how many of those has Tobi reviewed and analyzed all to hell, and can Tobi make shadow clones? Used properly, he could poke everyone right in their weak spots more or less simultaneously.

What other techniques are in the first couple chapters that could make a comeback?