The Lego Star Wars games are licensed products already and are made by Travellers Tales, which is now owned by Warner Bros. The last Lego Star Wars game was Lego Star Wars 3 the Clone Wars, which is already out.
New Lego Star wars games by Warner Bros are not out of the question either, as Disney just licensed Marvel charcaters to them for a new game called Lego Marvel Super Heroes, despite the fact Warner Bros owns DC comics and also put out a Lego Batman 2: DC Super Heroes last year.
The simple fact is Lego video games are licenses to make money and Disney likes money, so I would expect to see a Lego star Wars game to with Episode 7/8/9.