All signs sign to point out that Prince's plans for Paris are going on: first the release of Lotus flow3r by Because Music ONLY in France, then rumours of all kinds during and before summer, then the cancelled appearance at Canal + at the begining of September, and then, finally, this week he appears at different fashion parades, being showcased in most media.
Now we have the announced gigs for Sunday (Grand Palais) and for Monday (La Cigale), rumours of a press conference on Monday, the recent leaks of his DVD from Montreux in youtube... all this activity can not be a random series of events.
My bet: the official release of the Montreux DVD is around the corner, and Prince plans to make a long residence in Paris, just like he did in Las Vegas in 2006 or in London in 2007. Obviously the complete information (dates, venues, bands...) are unknown (and maybe even not set up yet), but hopefully we could get more (full?) details on Monday.
Time will tell if I am right or wrong. In the mean time, you have the famous Montreux videos at youtube to have some fun.