Simple Question about player.dat files

Hi there, quick question

I currently have 2 maps running, a 1.7 map and a 1.8 map. All the players are currently on the 1.7 map, but I want to move them all to the 1.8 map soon (while wiping their inventories).

I have the plugin HeroSpawn, so I'm thinking what I could do is:

Delete all the player.dat files in the world folder, and then all players would have their inventories deleted and would be teleported to the "HeroSpawn" because the plugin would think that they're new players.

Would this work?

Whoops, just realized I can use MultiInv and set up a portal to the new world. Nvm!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.