I have a bad feeling that they are going to outright retcon A LOT of stuff in this.
- The gate design (obviously, they've already shown it)
- When the gate is first activated (Obviously, they've already shown this)
- How the gate is first activated (THIS, This brings in a lot of problems, because no one knows what the gate does, nor how it even works. It's obvious the DHD is going to be used in this webseries. If the DHD is used then people already know the gate works, et cetera.)
- The Goa'uld are likely going to be heavily retconned, if there even mentioned, or not written out completely.
- Catherine's experiences with the Stargate. We already have her fighting literal Nazi's over the Stargate........
- Who had the Gate and when. We KNOW the Germans had the DHD, then the Russian's got their hands on it after the war, but the Stargate was never in the hands of the German's.