No, Action Comics is a comic book series published by DC Comics. It didn't become DC Comics. DC Comics is a larger publishing company that encompasses many comic series, including Action Comics.
The numbering of Detective Comics and Action Comics was determined by the sequence of their release. It started from 1 and went up with each new installment. Sometimes there might have been special issues or re-numbering for marketing or editorial reasons.
Overall, Action Comics Rebirth is definitely worth a read. The updated storylines and art style give a fresh take on the classic characters. It brings new excitement and depth to the franchise.
Well, finding out who owns Action Comics 1 is a mystery. It could be someone who's a huge comic book fan or a collector who values it highly. The ownership could have passed through various transactions and collectors over time.
Action Comics #1 is highly valuable. Its worth is determined by factors like preservation, completeness, and provenance. A mint condition copy could be worth a fortune.
I don't have the exact count. But you could try looking on comic forums or asking experts in the comic community. Sometimes they have more up-to-date and detailed information.