The pocket is definitely round ala Strat. But what I'm saying is that it appears to be angled ever-so-slighty where the pocket meets the cutaway. Assuming this does not affect the inside of the pocket, you should be good...as long as you go with a Strat or Tele Deluxe neck...
Oh, & I have a sneakin' feeling it might be an Ibanez...could be wrong...