Remember, classic DS could send you across space and time casually.
__________________ What CDTM believes;
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
Bob would never be there. It would only work if Darkseid somehow boom tubed to Bob's location. But how would he know this? The Sentry is just a puppet created by Robert's mind. According to his origin story; This guy warped reality to the point that he disappeared, or masked his whereabouts from all creation. That alone implies multiversal level control in scope. Which also happens to pertain to every possible time line.
Sentry is a near identical copy, or creation of a real to life vastly powerful man. Well, at least as far down to what his near identical molecules will take him. Except for one thing, his very near to real body is just a solidified concept that is created by Bob's mind. He'd just make a new Sentry. Darkseid's OS may, or may not be able to affect the Sentry's body as well, and even if it did it would be irrelevant. And even at that, it really all depends on how focused Bob's mind is. The Sentry has exhibited variable power levels without a doubt if you research what he's done in case of doubt. Bob is also the Void. Just saying.
I just don't see any proof on either side. for all we know he may allow for the sanction to work, and in an instant create a new Sentry. Sentry did resist molecular dispersion and manipulation by a powerful force after all. Owen even took note that something was different about his molecules, and how they weren't native to the universe as if he shouldn't actually exist.
In a nutshell, the Sentry is a lot like Larfleeze's ring, and constructs. Except that he's physically more sophisticated. And, while Larfleeze is present on the battlefield Bob moves to a dimension, or space with irrelevant distance to the actual encounter.
The Sentry...Standing there in front of Darkseid(which is what this thread is asking)...Would be sent hurling through the timestream in a 'life trap' tailor made for him by the Omega Sanction.
Physical regeneration is irrelevant here. The only way for Sentry to 'beat' the Omega Sanction, is if he can 'beat' that sort of temporal manipulation.