If anything the impetus for Billy forming his own League should be for his Squadron of Justice - .
https://community.cbr.com/showthread...=1#post3617467
That ^ is where you should direct DC to refocus a SHAZAM lead team.
The SHAZAMILY has been nicely re-established. He can call on them when he needs.
Where they need to expand. What they are constantly neglecting (and have been for decades) is the other heroes of the Fawcett Universe.
Playing Billy as a second string to Superman and Batman. Joining their already established team the JL, which instantly cast him as secondary to them.
Has been the greatest disservice to the character.
When what he should be doing is forming and leading his own team of Fawcett heroes!
Expanding the Fawcett franchise, not consolidating it, which has been DC's approach.
This is where diversity of power and theme in a SHAZAM lead team should shine, he can have both the SHAZAMILY and the Squadron. Sadly DC and worse the fans ignore it.