Okay the outfits for modern Rocket are nice though, at least one of them is faithful to his original outfit, at least Carlos Alazraqui did a decent performance than Dave Lamb who by the way voiced Rocket Racer in queue animations for the now retired Rocket Racers ride (More like a arcade game if you ask me), Also I like the idea that his real name is Ricky (short for Richard), well there's three things I have to gripe about modern Rocket:
1. The writers of LEGO City Adventures did not do any justice to Rocket's personality. But to be fair, the writers were only given the character and that's it, no history for him which I believe why in the show they didn't mention his history as a racer. Rocket in the show is portrayed as the calm brainiac of the Stuntz team. I thought this was out of character for him, but luckily in the recent commercials they restored his original personality.
2. Why the brown slick hair? Then this could be me being biased to LR1 Rocket, but when I look at his hair print on his original design, I get the impression that his hair is messy. No offense Austin William Carlson, this what I think what Modern Rocket should look:
So I found out that Modern Rocket's haircut was supposed to be inspired by Billy Campbell's character, Cliff Secord in the 1991 film: The Rocketeer: (See Trivia). So I guess Austin William Carlson took this inspiration when redesigning Rocket Racer
3. Why a Stunt Performing career? I get that Racers is dead now, but it's in his name, but I also get that Rocket was supposed to retire after the original LEGO Racers game. But luckily he's in LEGO 2K Drive, a racing game which I may do my thoughts on.
Overall here are my guesses: Either Rocket time traveled to the 2020s like loreescape theorizes hence why Rocket hasn't aged, or this is G2 Rocket (or G3 if you count Drome Racers' Rocket) or this a Johnny Thunder situation (Johnny was either a compassionate adventurer or a egotistical celebrity)