I am not really sure this is the right place to bring this up, or if this has been discussed before, but here goes:
I am wondering if there is a mod in the works that ensures some kind of continuity between Black Mesa and Half-Life 2 and its episodes. Like implementing Black Mesa’s Test Chamber in Half-Life 2’s intro, or replacing Valve’s more 1-1 recreation of the Anomalous Materials lobby with Black Mesa’s more detailed version in Episode 2.
Of course, I don’t imagine that it is a thing that the dev team would work on. If anything I think something of this scope falls more into something the community would be likely to do.