Something is very uncertain for me at the moment, but now it is getting clearer for me. Some weeks ago, Schumacher hinted that he will be sort his future in October. It was before the whole Hamilton - Mercedes saga comes in the picture. So how Michael knows that early that he can decide on his future in October.
When Michael said he will decide in October, at that time it was clear for Merc that they want another guy because of future purposes.
It is very interesting how Michael will decide but I wish him a great drive somewhere else.
Anyway from the Mercedes perspective it is a good move (if it is true) because now a British team has a British driver, a very fast driver. It will be a clear comparison that how good is now the current driver line-up at Mercedes.