There are many scenarios that could that could transpire.
a.) If they are made up of the original people they may have fleeting fame but not for their music. It would likely be that at least (at this post) two members have been dead for quite a while.
b.) If they are made of of younger modern people then a lot of it would be the circumstances of discovery. Many events transpired in the original discovery that had nothing to do with the Beatles per se.
c.) If it was divine or fateful that they exist in this time and be discovered then would it not be the same outcome? They certainly would be influenced by events in their lives that defined who they are and were. There would have to be a modern George Martin.
d.) The question is mute because we already know the answer. They are discovered daily and maybe hourly by younger generations at different times of their lives. USA reported on Dec 27, 2015 "
Billboard reports that
Come Together is Spotify's most-streamed Beatles song thus far, the
Abbey Road classic landing in the top spot on both the U.S. and global Beatles lists."