Well, from what I know, beta testing involves more than to know the previous games.
There will be a small part where you play, but most of the time you'll need to test everything that comes in your mind (and not), check every bit of detail that the engine has to offer, but also keep track (date, time, place, occurance, factors involved, etc) of everything that shouldn't be happening (a.k.a "bugs").
Have a lovely weekend and yes, I'm eager for more details, but I hope it'll be before 2012 (20-1-2-20-1-2)!