I imagine if it's real they're just going to reset ELO and scoreboards, neither of which mean a whole lot to me.
I highly doubt they'd completely wipe everyone's collection of cars. There would be a ton of returns on the game because very few people are going to play through twice, especially people who got pretty far into the game legitimately.
edit: Just went and checked it out. That thing stinks of fake.
Why would MGS need a press release?
Why wouldn't MGS proofread their press release?
That said, there are a ton of issues that I hope do get fixed:
* Engines bogging down for no apparent reason
* Ditching or extending the 30 second timer for long races and/or league races (race distance should be taken into consideration, and I'd probably be pissed if I were running for credits and got zip and a DNF for finishing 31 seconds behind the leader)
* All the money glitches and exploits
* The fact that if you cannot join a pub race in online career it boots you all the way out into the online career class selection instead of server selection
* The fact that some of the bodykit options just give off the wall rating changes. Rating changes should not be given automatically for installing the parts. They should be standard with any bonuses reaped by adjusting aero settings at the setup screen.
* Just as a suggestion I'd like "superstock" and "stock" classes in addition to the letter designations. Stock meaning only straight stock cars in a class can compete and Superstock meaning any class car that was originally a certain class can race (example: any class acceptable so long as it's a D in pure stock). That would be good times
It would be nice if there was a little bit of weighting to it, of course that makes the calculation more complicated. 
