This is an interesting question ,G-Man ,l never did like it that Bruce never had any relatives but isn't it possible that his mother did had a sibling because isn't Kate Kane (Batwoman) his cousin or something because what's the odds that two women with same last names ,both weathy lived in same city , is NOT related!! somehow. It was established that in Gotham City whatever the Waynes don't own the Kanes do
which member of each Superheroes Groups is the Heart of the team . The one hero on the team that every other heroes confide in and trust , an if anything ever happen to that hero the team will most likely disband
JLA - Martian Manhunter JSA - The Flash (Jay Garrick) Fantastic Four - The Thing Avengers - Vision (past) / don't know now
these are the heroes l think who are the Heart of their Superteam , but who do you think is the Heart ?