Originally Posted by
Digifiend
1. Yes, Crisis on Infinite Earths merged Supergirl's Earth-38 and Arrow's Earth-1 into a new Earth Prime, so all Arrowverse shows are now on one Earth, including Supergirl and Black Lightning. Despite ending up on CW, Stargirl won't be folded in, she's Earth-2.
2. No, Lois didn't get pregnant with twins. Apparently they just had kids earlier and therefore already have a second one, who is called Jordan (not Conner). I wonder if he's named after Jor-El? That way both of Clark's kids would be named after his fathers.
3. Don't know.
4. Titans is indeed still on a different Earth. I doubt Jonathan and Martha have even been mentioned, as they've only used Superboy (Conner), not Superman.