Oh no you don't. We've been before. Now with Porsche clearly fine with dipping into the Formula One driver pool for their , the silly season rumors around F1 drivers and the World Endurance Championship are bound to get even sillier.
Here's a theory that I'm just going to throw out there: Felipe Massa is from Brazil. Interlagos, where the 6 Hours of Sao Paulo is being held this weekend, is also in Brazil. Motorsports is also a tiny, tiny world where folks who do one type of racing tend to have friends in other kinds of racing.
Back away from the tin-foil hats. Williams probably isn't going to pull a Force India and let Massa out of their sights for long enough to go run a couple WEC races on F1's off weekends.
So, wild theory: he's just out to enjoy a lovely race weekend at his home venue.