Here's some quotes i got from twitter.
StevenRuckey That is incorrect. The level cap will remain 50 for 1.3. ^MD
@Lordgregadeath There is a new planet coming, Makeb! However, it will not be in 1.3. Hope that clears up any confusion! ^MD
HK-51 is in the works (we are still waiting on some essential parts for him), but will not be making it into 1.3. ^MD
So is bioware actually putting anything into 1.3 that delayed the servers coming back online by over three hours or are they gonna have to break out the atristic integrity again?