Would be really best for the Belgian international if he moves out the Santiago Bernabeu as so far since his arrival he has only been a liability to the club. He constant injuries has really marred his performance.
Don't seem to know what spell was cast on him as he was reckoned to be one of the best forward in the world before the switch. Just too sad has he valuation and all dropped drastically.
Moving to his former club might help rescusitate his already deing career. He might not be able to regain some quality displays he showed at the Chelsea but I believe it will be much better.
Been 30 years of age, he still has some years to give to football. Hope his career doesn't just fade off in such matter. I believe he will be welcomed at Chelsea after giving them close to eight years. Wish him the best in whatever decision he takes next.