Hard to know how literally to take the form. We now know Fil Dor is smart, but he's likely to have improved considerably since that debut run in France. In That World has to be useful to pick the race up the way he did, but he looked much sharper than Fil Dor on the day. It's hard to be conclusive about these things on a grainy video, but Fil Dor looked as though he was carrying a bit of condition, whereas In This World looked pretty straight.
In This World is getting a test today with a previous winner of Hawke's, and a King horse that has a decent flat rating and plenty of racing experience. I think it's more about how he performs than whether he wins the race. FWIW I think there is a tendency to take first runs a bit too literally on here. With novices hurdlers and chasers in particular the best time to start making an assessment is on their second run. The same is generally true about seasonal debuts. You wouldn't be writing Minella Indo off from winning the Gold Cup after Saturday's defeat, but people have Elle Est Belle in the bin. So as such if In This World gets turned over today, it wouldn't bother me unless he couldn't jump a twig and he was somewhere thereabouts.
I certainly wouldn't be backing him today though, just as I didn't back Elle Est Belle or Broomfield Burg yesterday. Backing novices on debut is the quickest way to the poorhouse.