100% you can. A month before this relaunch Superman has his full array of powers, is happily married, has a long standing relationship with the rest of the superhero community and a long standing membership of the JLA.
Now, to the best of my understanding. He's at the basic level of his powers, he has never been married, his JLA membership is only 5 years old, and his longstanding relationships with the rest of the superhero community isn't as strong as it was.
That's all regression. He was at one point and now he's at a lower point that he surpassed decades ago in "real" time.