But we do know that rumours of
Daniel Negreanu's putting in an appearance look to be founded - he is playing tomorrow, now that he's joined forces with Pokerstars. It's believed he's not a big fan of the transatlantic commute, so he's probably here on an extended trip to encompass the WSOPE and maybe EPT London too.
Based on his blog entry located
here, it doesn't appear as if he has a problem with transatlantic commutes, based on the sheer number of flights he'll be taking back and forth.

Seems like he even will fly London -> Las Vegas -> London just to be home for 6 days in between WSOPE and EPT London.