Ultimately, they would want 1, Zerø, Code Veronica, 5 and 6 in RE Engine glory, especially if the sales for the upcoming remakes are good. The neXt one should sell well, if not at least better than RE3R.
I think its just a matter of when, they are going to release those 5 remakes. 2-3-4 sounds like an obvious release order, but story wise, Code Veronica should have been out out before 4. If they release 5 neXt, then 6 seems like a no brainer, unless they would want the last numbered game before the first RE Engine game - RE7, to take the backseat infavor of 1, Zerø and CV. But also in hindsight, they probably should started with Zerø and 1. But I guess remaking 1 for the second time, before RE2, was bit of a stretch at that time, even if the remake of RE1 looks quite dated now (compare to these newer games) because of its fiXed camera.
I would release the neXt several remakes in these years
2025
2027
2029
2031
2033
Even with the 2 year gap (which sounds unlikely to happen), it would take at least a decade to have RE0 to RE6 in RE Engine. Based from reports, there's no RE game targeted for release in 2024.