dc.wikia.com

PY01J TIL that, although the character of Batman is famous today for refusing to kill anyone, his first issue featured him punching the villain into a vat of acid and declaring it "a fitting end for his kind".
5YgDD TIL that there is one character owned by both Marvel and DC, named Access, whose sole purpose is to keep both universes separate
KOAK6 TIL there is one character owned by both Marvel and DC, named Access, whose sole purpose is to try to keep both companies' universes separate.