Thread:ADour/@comment-4368470-20180805153100/@comment-16461120-20180805232700

For what it's worth, you can already "find other comics that take place in that same timeline." (To use your example, there's Category:Earth-1610/Appearances.)

As for the Prime Marvel Universe, everything that doesn't list a reality should take place there. (For some reason it was decided before my time that we don't add a comic to Category:Earth-616/Appearances unless the issue specifically mentions it or involves multiple realities.)