Assmuption 1. If reality consists of material and nothing else then who we are and our consciousness arises purely from the order of the material substance of our bodies - primarily our brains. There is no spirit or soul involved.
With ya so far.
Assumption 2. Since the material substance of the universe obeys consistent laws, the position and configuration of material in the universe at any given point in time could, in principle, be extrapolated from the position and trajectory of the material substance of the universe at any other given time.
There is a fairly decent chance that this assumption is not consistent with our universe. Things like black holes may actually destroy the ability to extrapolate back in time as mater that enters them can no longer causally affect matter that is outside of them. There are some possible solutions to this "information paradox" but it is not yet clear if information is actually destroyed (from our perspective) when something enters a black hole.
Furthermore, due to the uncertainties in quantum mechanics, our universe is not deterministic. At best we could calculate the probabilities of certain events happening (or having happened, if we're extrapolating backwards) but we could not with perfect certainty reconstruct the past position and momentum of any particle based on having seen it at a future time.
Assumption 3. Over time humans (or intelligent beings generally) accumulate information about the universe, its content and laws. If this accumulation continues indefinitely it will inevitably reach a point where the material composition of the universe is known exhaustively, not simply for one point in time, but for all time. Just as geologists are now able to create maps of how the continents were configured millions of years ago by extrapolating continental movement according to physical laws, future scientists will be able to map out the exact composition of all matter at all previous points in time according to physical laws.
The assumption that we will continue to accumulate information is probably pretty good, but extending that to assume that we'd have all information after an infinite period of time does not hold. It's perhaps counter-intuitive to people that aren't used to dealing with infinity (and the various cardinalities thereof) but gaining knowledge indefinitely does not imply that all knowledge will at some point be gained. Furthermore, the assumption that we will continue gaining knowledge "indefinitely" is false because the universe will inevitably suffer heat death at which point no intelligence will be able to exist and, indeed, nothing will be able to happen. But don't worry, all civilizations will be long gone well before even that happens.
Assumptions 4. A civilisation or intelligence which has been able to exhaustively map the material composition and configuration of the universe over all of time will also be in a position to recreate entities including people from the past by recreating their exact material condition.
It seems that the assumption here (as most of this follows from your above assumptions) is that the technology to recreate, exactly, a given thing based on knowing precisely how it was structured. Again, due to quantum effects, this is probably impossible.
Assumption 5. Humans of each generation will be suficciently attached to their parents and immediate ancestors to insist they are brought back to life when it becomes feasible to do so.
This is a terrible assumption. I'm certain that a reasonably large percentage of the population does not have nostalgic views of their parents to bother recreating them. Even of those that would have this attachment, I expect many would opt not to recreate the person only to watch them die again, as they inevitably would.
If all of these assumptions are true, it seems to me that a general resurrection at some point is not just likely but pretty inevitable. Which is a ridiculous thing to say. But it seems to follow from the assumptions. And each of the assumptions as they stand seem quite reasonable.
1/5 of your assumptions is reasonable. There's no logic in expecting a resurrection of any kind.