It would be cute...big brother and little brother getting in at the same time.
But seriously, Big Ben shouldn't be a slam dunk first-ballot Hall of Fame guy. I'd vote for him, but it's not like he's this no-brainer as the media has painted him to be for many years. 18 seasons, 6 pro bowls, zero all pros, zero times he's even been considered an MVP candidate (zero MVP votes), peaked out at #18 on NFL Top 100 voted by players. After that Steelers defense disbanded, he was 3-7 in the playoffs including 1-and-done 5 out of 7 times. In three SBs, he had 3 TDs, 5 INTs. He had exceptional talent all around him his whole career.
I think he belongs in the Hall...he was a great player, just below the elite category and almost in his own tier because he was definitely better than your typical "great, except he's not elite" guy. He was able to carry a team to divisional crowns and could carry them on any given day, but he wasn't able to elevate a team to the next level because other QBs were better.
But I think he should serve as "the line" - anyone better than him is a Hall of Famer, and anyone worse than him shouldn't get in if it were really about only the very best.