There was a recent post (facebook or blog post) by UE4 saying it’ll be integrated with 4.11.
I believe that should be out in in time to make the upgrades and do some light testing if you receive CV1, before day 1 release.
Oculus is reviewing games now, so I’d imagine you could submit one for runtime 0.7.0.0 or 0.8.0.0, get it approved, then upload the 1.0.0.0 build before day 1 release.
It’ll most likely be fine I think, just a little rushed