They already have that I think
Feature suggestion: allow previous games to be played through in real time

By the way, IIRC chess.com's real time replay is better than by far than some other's.
Those delay it with piece animation. That doesn't matter for most blitz time controls, but in 1|0 bullet it's ridiculous. A reply of a 1|0 game can take more like 3 minutes.

Deleted the last post from @antisunechess with a supposed link to a live chess game replay but was automatically joining people to the club.
This sort of co-ordinated deception is not acceptable here on Chess.com, folks: you have worked together to try and trick people into joining. Even though they can just leave, this is not ok: I disabled this club to reinforce that notion. If you can acknowledge this and promise not to do it any more, we would be happy to re-open the club.
Thanks,
David, moderator

Deleted the last post from @antisunechess with a supposed link to a live chess game replay but was automatically joining people to the club.
This sort of co-ordinated deception is not acceptable here on Chess.com, folks: you have worked together to try and trick people into joining. Even though they can just leave, this is not ok: I disabled this club to reinforce that notion. If you can acknowledge this and promise not to do it any more, we would be happy to re-open the club.
Thanks,
David, moderator
Shush
I would particularly use this for bullet and blitz games to improve, where the moves are made (when you press play) after the actual amount of thinking time that passed.