I'm a fan along with my fiance, she showed me the story last night.
Nothing wrong with the lads getting together, but I feel that it would be a mistake to try emulate their fathers and of The Beatles name too much.
Music history has shown that whenever a group is compared to The Beatles, they are doomed to live up to them by the media and public which is an impossible task.
Oasis were about the most successful but even then they've had some serious drubbings for it. Beady Eye have overdone it since, they seem more like an Oasis parody to me anyway lol.
Manufactured boybands like One Direction being recently compared to them is just a huge joke from the start.
They would just need to be themselves, don't try to deliberately emulate the sound of The Beatles. They might share their genes but their creative talent is something else altogether.