The New52 timeline is still the one DC is continuing, mostly. TBH the other ones would be more like the alternate timelines since they are just joining the fold. It's moot though because they are all recognized now.
I don't know if you're older or what, I mean that respectfully and I ask because I saw you ask like 6 or 7 different times "how can superman have dated Diana when he was also married to Lois at the time?" like you didn't realize that they happened to two different Supermans..... One was called "New 52 Superman" who had a different costume who dated Diana, then he died. Until then, the other Superman wasn't in the picture. He was already married to Lois on a different earth.
I feel sort of bad because so many people were explaining it to you and you still didn't even understand that there were two of them... what you have to do is read the one shot "Superman: Rebirth." It will explain everything you missed. In it, newer Clark and Lana talk about the New52 Superman and watch a kryptonian crystal hologram that New52 Superman left behind. The newer Clark talking to Lana is literally a different person from the New52 superman and wore a black suit. He came to main Earth right before New 52 Superman's death and for a short period they coexisted there. He even met New52 Superman face to face at the time he died. There are probably some videos on youtube you could watch that explain if it still confusing.