DC Comics Presents is already on the canonical list (see
https://www.supermanthroughtheages.com/wiki/index.php/Canonical_sources ), so I guess you'd get Captain Marvel through any appearances in that title. I think adding
All Star Squadron and
JLA would be a very bad move, you might as well just add the entire DCU if you're going to do that, and that'd be much too far off topic. Right now the list is limited to Superman and Superman family titles.
Keep in mind that the focus here is Superman. I think that trying to modify the list of canonical sources in order to get characters you like is the wrong way to look at things. A more appropriate approach might be to look up which characters are in the canonical sources - and hence, which characters should be in Supermanica. If random character "Thunder Tomato" never appears in the canonical sources, then he shouldn't be listed in Supermanica, in spite of the fact that he's a cool character and Superman once appeared in
Terrible Tomato Tales and told Mr. Tomato that he liked him.
