Of all the super heroes they could choose to experiment with they choose Superman? He just does not fit that build for me. But why? Usuually these twists come when the popularity of a character is dying but I don't think Superman will ever die he is number one so why do this to him?
He is a new Superman in that the story is different or that he isn't Kalel. If he is Kalel then its just a different version of the SAME superhero we know. I have nothing against anyone's sexual preference, my point is that Superman has built his lifestyle around his love for Lois so adding another person there even if it were another woman just does not fit Superman all good nature.
All superheroes have to be 'reinvented' to attract more readers to the comics and such over time. And they did a good job with Superman, being inclusive to someone like myself who is bisexual. It's interesting seeing a bi man living his life, which is a very rare thing to see in literature (Which I do include comics and such in).
I always remember these changes are for money, and sometimes it comes with a positive for the culture we live in.